* Em không biết, dù biết thì cũng không giống đâu.
Các thông tin cần biết khi tham gia Giúp tôi giải toán
"Giúp tôi giải toán" trên Online Math đã trở thành một diễn đàn hết sức sôi động cho các bạn học sinh, các thầy cô giáo và các bậc phụ huynh từ mọi miền đất nước. Ở đây các bạn có thể chia sẻ các bài toán khó, lời giải hay và giúp nhau cùng tiến bộ. Để diễn đàn này ngày càng hữu ích, các bạn lưu ý các thông tin sau đây:
I. Nội qui tham gia "Giúp tôi giải toán"
1. Không đưa câu hỏi linh tinh lên diễn đàn, chỉ đưa các bài mà mình không giải được hoặc các câu hỏi hay lên diễn đàn;
2. Không trả lời linh tinh, không phù hợp với nội dung câu hỏi trên diễn đàn.
3. Không "Đúng" vào các câu trả lời linh tinh nhằm gian lận điểm hỏi đáp.
Các bạn vi phạm 3 điều trên sẽ bị giáo viên của Online Math trừ hết điểm hỏi đáp, có thể bị khóa tài khoản hoặc bị cấm vĩnh viễn không đăng nhập vào trang web.
II. Cách nhận biết câu trả lời đúng
Trên diễn đàn có thể có rất nhiều bạn tham gia giải toán. Vậy câu trả lời nào là đúng và tin cậy được? Các bạn có thể nhận biết các câu trả lời đúng thông qua 6 cách sau đây:
1. Lời giải rõ ràng, hợp lý (vì nghĩ ra lời giải có thể khó nhưng rất dễ để nhận biết một lời giải có là hợp lý hay không. Chúng ta sẽ học được nhiều bài học từ các lời giải hay và hợp lý, kể cả các lời giải đó không đúng.)
2. Lời giải từ các giáo viên của Online Math có thể tin cậy được (chú ý: dấu hiệu để nhận biết Giáo viên của Online Math là các thành viên có gắn chứ "Quản lý" ở ngay sau tên thành viên.)
3. Lời giải có số bạn chọn "Đúng" càng nhiều thì càng tin cậy.
4. Người trả lời có điểm hỏi đáp càng cao thì độ tin cậy của lời giải sẽ càng cao.
5. Các bài có dòng chữ "Câu trả lời này đã được Online Math chọn" là các lời giải tin cậy được (vì đã được duyệt bởi các giáo viên của Online Math.)
6. Các lời giải do chính người đặt câu hỏi chọn cũng là các câu trả lời có thể tin cậy được.
III. Thưởng VIP cho các thành viên tích cực
Online Math hiện có 2 loại giải thưởng cho các bạn có điểm hỏi đáp cao: Giải thưởng chiếc áo in hình logo của Online Math cho 5 bạn có điểm hỏi đáp cao nhất trong tháng và giải thưởng thẻ cào 50.000đ hoặc 2 tháng VIP cho 6 bạn có điểm hỏi đáp cao nhất trong tuần. Thông tin về các bạn được thưởng tiền được cập nhật thường xuyên tại đây.
đây chỉ là trắc nghiệm
Leave me out.
There are some English words, each with a redundant letter. You have to take that redundant letter out from each word to make it correct.
For example: Peen
→ ______
The answer is e.
1. soeme
2. diarsy
3. farem
4. youeng
5. rachk
6. yarnd
7. whithe
8. destineation
9. atuthor
10. packett
Smart Monkey.
Match the English word with the Vietnamese definition.
| Laugh | Horse | môn Thể Dục | Sửa chữa | Bút chì |
| Pencil | Con gà mái | Con ngựa | Physical Education | Dentist |
| Dây thừng | Cry | Swim | Repair | Nha sĩ |
| Cười | Khóc | Hen | Bơi lội | Rope |
1. Laugh - .......................
2. Pencil - ..................
3. Horse - ...................
4. Cry - ...................
5. Swim - ....................
6. Hen - .....................
7. Physical Education - .......................
8. Repair - .................
9. Dentist - .....................
10. Rope - ..............
Find the honey.
Choose the correct answer for each question in order to make the bear move forward and successfully find the honey.
1. "Ba will never be a famous guitarist." means __________________.
He is good at playing the guitarHe isn't good at playing the guitarHe can play the guitarHe can't play the guitar.2. She ________ studies in the library after school.
isn't alwaysalways isalwaysdoesn't always3. I'd _________, please.
some beefsome beefsfew beefa few beef4. Choose the odd one out.
riverlakeseamountainhok tót
oh shit what the hell are you talking about this thing
Bài tập giới từ luyện thi IOE
1. Do you enjoy driving____ night? (in/ during/ at/ on)
2. I’m taking my driving test _____ 4. 30_____ July 3rd. (in/ at, at/ in, at/ on, on/ at)
3. He was born____ 1900 and died____ 1972. (in/ in, in/ on, from/ to, in/ on)
4. ____ the end of the film I felt very sad. (on/ towards/ at/ in)
5. I hated school at first, but_____ the end I quite enjoyed it. (in/ at/ of/ to)
6. They’re going to Italy____ the end of next week. (at/ in/ on/ from)
7. Some people were talking in the cinema____ the film. (during/ in/ with/ over)
8. We’ve been waiting_____ almost an hour. (in/ during/ since/ for)
9. They hope to finish the job____ Thursday next week(on/ at/ for/ by)
10. I’ve known her_____ three months. (since/ for/ in/ during)
11. My grandparents visited Edinburgh______ two weeks in 1980. (since/ in/ from/ for)
12. They had been there five years ______ so it wasn’t completely new to them. (before/ ago/ for/ since)
13. My brother has been interested in music_______ quite a long time. (before/ ago/ for/ since)
14. He was given his first guitar 20 years______. (since/ for/ before/ ago)
15. She has been working for the same newspaper ever ______then (since/ for/ ago/ before)
16. His car had broken down and he had to come ____ taxi. (/ in/ by/ on)
17. The journey takes 10 minutes by bus and about 25 minutes ______foot. (on/ in/ by/ at)
18. They are very proud______ their children. (of/ with/ from/ for)
19. Are you worried ______ yor driving test? (for/ with/ by/ about)
20. You’re very good _____ explaining things. (on/ about/ in/ at)
21. Sydney in Australia is famous _____ its Opera House. (for/ about/ with/ from)
22. She’s quite capable____ doing the job. (in/ at/ on/ of)
23. We’re getting really excited_____ our holiday. (about/ of/ in/ for)
24. Are you interested_____ playing tennis tomorrow? (in/ at/ on/ of)
25. He’s not very keen ____ football.
26. It was very kind ____ them to give us a lift to the station. (of/ to/ in/ at)
27. Are you afraid____ flying? (of/ about/ at/ with)
28. The garden is full____ roses. (of/ by/ with/ for)
29. We’re a bit short ___ petrol. (about/ of/ in/ for)
30. I’m not very good_____ drawing. (at/ in/ for/ on)
31. My grandparents are very fond_____ their old cat. (of/ with/ at/ by)
32. Cricket is quite different____ baseball. (for/ with/ to/ from)
33. Your hairstyle is quite similar ____mine. (to/ from/ with/ for)
34. She was very angry____ me for losing her key. (with/ for/ about/ to)
35. What are the main differences_____ the two countries? (into/ for/ with/ between)
36. The book, Gone With the Wind, was written _____ Margaret Mitchell. (by/ of/ with/ to)
37. This car isn’t my. It belongs ___ Mike. (to/ of/ at/ for)
38. Selfish people only care_____ themselves. (about/ for/ after/ to)
39. I won’t tell anyone what happened. You can rely___ me. (at/ on/ in/ of)
40. She apologized___ me for losing her temper. (at/ towards/ to/ for)
41. I’ve written to the company and applied _____the job. (for/ about/ of/ with)
42. Mrs. Woods suffers ______ bronchitis. (from/ with/ by/ to)
43. My grandfather died_____ old age. (at/ of/ in/ to)
44. We’re thinking_____ going to the cinema. (of/ for/ in/ to)
45. Thank you for looking___ my mother while she was ill. (for/ after/ at/ in)
46. I don’t believe___ horoscopes. (in/ of/ on/ about)
47. She dreams____ being an actress one day. (for/ to/ at/ of)
48. I dreamt____ my grandmother last night. (for/ on/ of/ about)
49. We’re are depending ____ you to help us. (to/ at/ of/ on)
50. The car went out of petrol and crashed _____the back of a bus. (into/ onto/ to/ in)
51. This town remind me_____ the place where I was born. (for/ to/ behind/ of)
52. Will you remind Peter _____the party next Sunday? (about/ for/ with/ on)
53. I congratulated Mary ____getting the new job. (on/ at/ in/ about)
54. I borrowed the umbrella____ a friend of mine. (until/ from/ to/ in)
55. They invited us_____ their house for dinner. (for/ about/ on/ to)
56. We’ve warned him_____ swimming in that part of the river. (about/ to/ on/ with)
57. Could you fill____ the application form, please? (on/ onto/ for/ in)
58. They just kept_____ making a noise even though I’d asked them to stop. (in/ on/ to/ for)
59. The price of coffee has gone____ again. (down/ away/ up/ off)
60. It’s very important...…………. you to revise your lessons every day. (for/ to/ on/ with)
61. Attending classes regularly is very important…………….. us. (on/ for/ to/ with)
62. These people are very kind...……. animals (to/ for/ with/ by)
63. It is very kind...…….. you to give me a lift. (to/ of/ on/ for)
64. Did you know that Linda was engaged...……….. a friend of mine? (to/ at/ on/ for)
65. My sister was married...……. a successful businessman. (to/ with/ from/ about)
66. These days most people are aware...……. the danger of smoking. (for/ of/ in/ to)
67. We’re short...…………staff in our office at the moment. (with/ for/ at/ of)
68. I found a box full...…… old letters. (at/ to/ by/ of)
69. Searching…………alternative fuels is necessary. (of/ on/ for/ to)
70. He paripated...…….. many cultural activities. (in/ of/ to/ for)
71. Vehicles account...………air pollution in the cities. (for/ in/ on/ at)
72. If you smoke, there ‘s a greater chance that you’ll die…………lung cancer. (to/ of/ for/ with)
73. We live ...…… food. (on/ in/ at/ for)
74. Don’t rely…………….. him. He is unreliable. (at/ for/ on/ to)
75. You must concentrate...………….. your study. (for/ in/ with/ on)
76. We tried to get...………… our problems. (for/ of/ to/ over)
77. The pilots will use English to ask...……… landing instructions. (for/ on/ to/ at)
78. Whom will I have to report...……….? (for/ at/ to/ in)
79. People believed that our natural resources could never be used...……….. (on/ out/ up/ at)
80. Water runs...… and take the soil...….. it. (of - with/ out – on/ off – with)
81. We must put the metal back ...……use. (to/ into/ in/ for)
82. Would you care...……….. a drink? (for/ about/ on/ at)
83. Carbon combined with oxygen turns...……… carbon dioxide. (to/ into/ with/ in)
84. On arriving...……. London, he found another explanation. (to/ in/ at/ for)
85. The man spoke ...…….. the dog with the sound of whip- lashes. (with/ to/ at/ for)
86. We want to help Mum out…………the money at home. (for/ with/ at/ to)
87. What can be inferred……….. the apparent ease of the transition? (to/ from/ at/ by)
88....…………. what age did you leave school? (At/ On/ By/ In)
89. Why can’t you do the work straight...………..? (away/ on/ to/ in)
90....………. the whole, they tend to be informal. (In/ On/ At/ With)
91. He was introduced...…………my mother. (with/ to/ for/ at)
92. They usually shake hands ...………business occasions. (on/ at/ for/ in)
93. They provided the children...………… clothes and food. (with/ for/ on/ to)
94. Who does this car belong...………? (to/ at/ in/ on)
95. Many people use English...……… their foreign language. (/ as/ for/ in)
96. She becomes bored...……… working here. (with/ to/ on/ for)
97. He is often late...……… school. (for/ at/ in/ to)
98. Many people are involved...…… the use of English. (to/ with/ in/ at)
99. You should go...……… the composition before you hand it in. (on/ over/ with/ at)
100. I think everything is going...………… nicely. (along/ off/ down/ up)
101. I have to work harder to keep pace...…… my classmates. (on/ in/ at/ with)
102. When I entered the room, I caught sight...…….. someone in the kitchen. (for/ to/ of/ with)
103. The government is determined to put an end...………… corruption. (for/ to/ of/ with)
104. We’ll leave ...…………….. Monday. (at/ on/ with/ to)
105. Your father was very kind ______________ David.
106. Hurry or you will be late ______________ school.
107. Were they present ______________ the meeting?
108. She was confused ______________ the dates.
109. His book is different ______________ mine.
110. Your plan is similar ______________ his.
111. Miss Lan is very popular ______________ her colleagues.
112. The boy was afraid ______________ the horse.
113. She is accustomed ______________ rising early.
114. The house was crowded ______________ students.
115. He was successful ______________ his job.
116. The child is very quick ______________ arithme.
117. The day seems perfect ______________ a picnic.
118. He was sad ______________ his friend’s failure.
119. The country is rich ______________ oil.
120. The museum is now open ______________ all visitors.
121. Are you aware ______________ the time?
122. Are you acquainted ______________ this man?
123. He has been absent ______________ school very often lately.
124. Attending all the lectures is important ______________ us.
1. Do you enjoy driving____ night?(in/during/at/on)
2. I’m taking my driving test _____ 4.30_____ July 3rd.(in/at, at/in, at/on, on/at)
3. He was born____ 1900 and died____ 1972.(in/in, in/on, from/to, in/on)
4. ____ the end of the film I felt very sad.(on/towards/at/in)
5. I hated school at first, but_____ the end I quite enjoyed it.(in/at/of/to)
6. They’re going to Italy____ the end of next week.(at/in/on/from)
7. Some people were talking in the cinema____ the film.(during/in/with/over)
8. We’ve been waiting_____ almost an hour.(in/during/since/for)
9. They hope to finish the job____ Thursday next week(on/at/for/by)
10. I’ve known her_____ three months.(since/for/in/during)
11. My grandparents visited Edinburgh______ two weeks in 1980.(since/in/from/for)
12. They had been there five years ______ so it wasn’t completely new to them.(before/ago/for/since)
13. My brother has been interested in music_______ quite a long time.(before/ago/for/since)
14. He was given his first guitar 20 years______.(since/for/before/ago)
15. She has been working for the same newspaper ever ______then(since/for/ago/before)
16. His car had broken down and he had to come ____ taxi.(like/in/by/on)
17. The journey takes 10 minutes by bus and about 25 minutes ______foot.(on/in/by/at)
18. They are very proud______ their children.(of/with/from/for)
19. Are you worried ______ yor driving test?(for/with/by/about)
20. You’re very good _____ explaining things.(on/about/in/at)
21. Sydney in Australia is famous _____ its Opera House.(for/about/with/from)
22. She’s quite capable____ doing the job.(in/at/on/of)
23. We’re getting really excited_____ our holiday.(about/of/in/for)
24. Are you interested_____ playing tennis tomorrow?(in/at/on/of)
25. He’s not very keen ____ football.
26. It was very kind ____ them to give us a lift to the station.(of/to/in/at)
27. Are you afraid____ flying?(of/about/at/with)
28. The garden is full____ roses.(of/by/with/for)
29. We’re a bit short ___ petrol.(about/of/in/for)
30. I’m not very good_____ drawing.(at/in/for/on)
31. My grandparents are very fond_____ their old cat.(of/with/at/by)
32. Cricket is quite different____ baseball.(for/with/to/from)
33. Your hairstyle is quite similar ____mine.(to/from/with/for)
34. She was very angry____ me for losing her key.(with/for/about/to)
35. What are the main differences_____ the two countries?(into/for/with/between)
36. The book, Gone With the Wind, was written _____ Margaret Mitchell.(by/of/with/to)
37. This car isn’t my. It belongs ___ Mike.(to/of/at/for)
38. Selfish people only care_____ themselves.(about/for/after/to)
39. I won’t tell anyone what happened. You can rely___ me.(at/on/in/of)
40. She apologized___ me for losing her temper.(at/towards/to/for)
41. I’ve written to the company and applied _____the job.(for/about/of/with)
42. Mrs. Woods suffers ______ bronchitis.(from/with/by/to)
43. My grandfather died_____ old age.(at/of/in/to)
44. We’re thinking_____ going to the cinema.(of/for/in/to)
45. Thank you for looking___ my mother while she was ill.(for/after/at/in)
46. I don’t believe___ horoscopes.(in/of/on/about)
47. She dreams____ being an actress one day.(for/to/at/of)
48. I dreamt____ my grandmother last night.(for/on/of/about)
49. We’re are depending ____ you to help us.(to/at/of/on)
50. The car went out of petrol and crashed _____the back of a bus.(into/onto/to/in)
51. This town remind me_____ the place where I was born.(for/to/behind/of)
52. Will you remind Peter _____the party next Sunday?(about/for/with/on)
53. I congratulated Mary ____getting the new job.(on/at/in/about)
54. I borrowed the umbrella____ a friend of mine.(until/from/to/in)
55. They invited us_____ their house for dinner.(for/about/on/to)
56. We’ve warned him_____ swimming in that part of the river.(about/to/on/with)
57. Could you fill____ the application form, please?(on/onto/for/in)
58. They just kept_____ making a noise even though I’d asked them to stop.(in/on/to/for)
59. The price of coffee has gone____ again.(down/away/up/off)
60. It’s very important …………….you to revise your lessons every day . ( for / to / on / with)
61. Attending classes regularly is very important……………..us . ( on / for / to / with)
62. These people are very kind ……….animals ( to / for / with / by )
63. It is very kind ……….. you to give me a lift. ( to / of / on / for )
64. Did you know that Linda was engaged ………….. a friend of mine ? ( to / at / on / for )
65. My sister was married ………. a successful businessman. ( to / with / from / about )
66. These days most people are aware ……….the danger of smoking. ( for / of / in / to )
67. We’re short ……………staff in our office at the moment . ( with / for / at / of )
68. I found a box full ……… old letters. ( at / to / by / of )
69. Searching…………alternative fuels is necessary. ( of / on / for / to )
70. He participated ……….. many cultural activities. ( in / of / to / for )
71. Vehicles account …………air pollution in the cities . ( for / in / on / at )
72. If you smoke , there ‘s a greater chance that you’ll die…………lung cancer.( to / of / for / with)
73. We live ……… food .( on / in / at / for )
74. Don’t rely……………..him . He is unreliable . ( at / for / on / to )
75. You must concentrate ……………..your study . ( for / in / with / on )
76. We tried to get …………… our problems. ( for / of / to / over )
77. The pilots will use English to ask ………… landing instructions. ( for / on / to / at )
78. Whom will I have to report ………….? ( for / at / to / in )
79. People believed that our natural resources could never be used …………..( on / out / up / at)
80. Water runs …… and take the soil …… ..it. ( of - with / out – on / off – with )
81. We must put the metal back ………use . ( to / into / in / for )
82. Would you care ………….. a drink ? ( for / about / on / at )
83. Carbon combined with oxygen turns ………… carbon dioxide. ( to / into / with / in)
84. On arriving ……….London , he found another explanation . ( to / in / at / for )
85. The man spoke ……….. the dog with the sound of whip- lashes. ( with / to / at / for )
86. We want to help Mum out…………the money at home . ( for / with / at / to )
87. What can be inferred………..the apparent ease of the transition ? ( to / from / at / by )
88. …………….what age did you leave school ? ( At / On / By / In )
89. Why can’t you do the work straight …………..? ( away / on / to / in )
90. ………….the whole , they tend to be informal . ( In / On / At / With)
91. He was introduced ……………my mother. ( with / to / for / at )
92. They usually shake hands …………business occasions. ( on / at / for / in )
93. They provided the children …………… clothes and food. ( with / for / on / to )
94. Who does this car belong …………? ( to / at / in / on )
95. Many people use English ………… their foreign language. ( like / as / for / in )
96. She becomes bored ………… working here. ( with / to / on / for )
97. He is often late ………… school. ( for / at / in / to )
98. Many people are involved ……… the use of English. ( to / with / in / at )
99. You should go ………… the composition before you hand it in. ( on / over / with / at )
100. I think everything is going …………… nicely. ( along / off / down / up )
101. I have to work harder to keep pace ……… my classmates. ( on / in / at / with )
102. When I entered the room, I caught sight ……….. someone in the kitchen. ( for / to / of / with )
103. The government is determined to put an end …………… corruption. ( for / to / of / with )
104. We’ll leave ………………..Monday . ( at / on / with / to )
105. Your father was very kind ______________ David.
106. Hurry or you will be late ______________ school.
107. Were they present ______________ the meeting?
108. She was confused ______________ the dates.
109. His book is different ______________ mine.
110. Your plan is similar ______________ his.
111. Miss Lan is very popular ______________ her colleagues.
112. The boy was afraid ______________ the horse.
113. She is accustomed ______________ rising early.
114. The house was crowded ______________ students.
115. He was successful ______________ his job.
116. The child is very quick ______________ arithmetic.
117. The day seems perfect ______________ a picnic.
118. He was sad ______________ his friend’s failure.
119. The country is rich ______________ oil.
120. The museum is now open ______________ all visitors.
121. Are you aware ______________ the time?
122. Are you acquainted ______________ this man?
123. He has been absent ______________ school very often lately.
124. Attending all the lectures is important ______________ us.
125. Is the proposal acceptable…………………..you?
126. He quickly became accustomed ………………….the local food
127. Nam is very clever ………………..making excuses
128. The bin is full ……………rubbish
129. She got back safe ……………………her adventure.
130. I'm not familiar………………her.
131. I hope you will be successful ……………….your work.
132. I'm bored……………….waiting here doing nothing.
133. At night , the dog is very quick................. hearing
134. This document is important .................. your case
135. He is very keen .............tennis
136. Parents are responsible ................. educating their children
137. The Suez canal is good........... the commerce of both East and West
138. Children are fond .......... sweets
139. I’m very pleased ........you
140. My interest is contrary .................. yours.
141. The boy is afraid ................. crossing the busy street
142. Be aware .................. your study.
143. Our country is rich................ natural resources
144. He is always good .............. his friends
145. The streets are crowded ............ people
146. I am not accustomed ………… wearing boots.
147. Learning English is very important …………… us.
148. The newspaper is full …………… advertising.
149. He can’t get used …………… getting up early.
150. Tom is only afraid ………… his father.
151. Everybody was surprised …………..…the news.
A) at B) in C) on D) with
152. I was delighted ………………the present you gave me.
A) at B) in C) on D) with
153. Are you excited ……………….…going on holiday next week.
A) at B) in C) on D) with
154. Tom is excellent ……………………repairing things.
A) at B) in C) by D) for
155. You get bored ………………doing the same thing everyday.
A) at B) in C) to D) with
156. I’m sure you are capable ………………..tourists.
A) to B) in C) of D) with
157. Mary is very fond …………………researching wild animals.
A) at B) to C) up D) of
158. Ann wasn’t very keen ……..……going out in the rain, so we stayed at home.
A) at B) in C) on D) with
159. Hurry, or you’ll be late ………………..school.
A) from B) for C) up D) to
160. Were they absent ……………………class yesterday.
A) from B) for C) on D) by
161. She was confused …………………..the dates.
A) beside B) on C) about D) of
162. The hall was crowded …………….………students.
A) at B) in C) on D) with
163. Miss White is very kind …………….…..her colleagues.
A) with B) up C) off D) to
164. She is accustomed ……………………..rising early.
A) to B) with C) in D) for
165. He was successful ………………..his job.
A) at B) in C) on D) with
166. Tom is very quick ………………..…Mathematics.
A) at B) in C) on D) with
167. I haven’t received a letter from her. I’m rather anxious ………………it.
A) at B) in C) about D) to
168. He was sad ……………………….his failure.
A) at B) in C) to D) about
169. This country is rich ……………..…..oil.
A) at B) in C) on D) with
170. Are you aware ……………….…the time.
A) at B) in C) on D) of
171. The museum is now open …………….…..all visitors.
A) with B) to C) on D) for
172. Smoking is harmful …………….…your health.
A) at B) in C) to D) in
173. Are you afraid …………………..snakes?
A) to B) out C) on D) of
174. Is she serious ………………..learning to be a pilot.
A) about B) in C) up D) over
175. Is this matter important ……………you?
A) at B) to C) off D) for
176. I just couldn’t believe what he said. It was contrary ………..…his thought.
A) from B) in C) out D) to
177. Don’t give up hope yet. Be confident …………….…..a success in the future.
A) at B) in C) on D) of
178. Please wait here. I’ll have some tickets available ……………them.
A) of B) for C) to D) off
179. Make yourself useful ……………..…others.
A) at B) to C) for D) of
180. It’s very kind …………….….you to help them.
A) at B) in C) on D) of
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