help em câu a và b

1.    We can’t go along here because the road_______.

         A. is repairing                      B. is repaired                         C. is being repaired                D. repairs

2.    The story I’ve just read_______ Agatha Christie.

         A. was written                      B. was written by                    C. was written from                 D. wrote by

3.    I’m going to go out and_______.

         A. have cut my hair              B. have my hair cut                 C. cut my hair                         D. my hair be cut

4.    Something funny_______ in class yesterday.

         A. happened                       B. was happened                   C. happens                            D. is happened

5.    Many US automobiles_______ in Detroit, Michigan

         A. manufacture                    B. have manufactured             C. are manufactured               D. are manufacturing

6.    We_______ by a loud noise during the night.

         A. woke up                         B. are woken up                     C. were woken up                   D. were waking up

7.    Some film stars_______ difficult to work with.

         A. are said be                     B. are said to be                    C. say to be                           D. said to be

8.    Why did Tom keep making jokes about me? – I don’t enjoy_______ at.

         A. be laughed                     B. to be laughed                    C. laughing                            D. being laughed

9.    Today, many serious childhood diseases_______ by early immunization.[ sự miễn dịch]

         A. are preventing                 B. can prevent                        C. prevent                              D. can be prevented

10.  Do you get your heating_______ every year?

         A. checking                         B. check                                C. be checked                        D. checked

1. We would like to see your ............................. in learning English this semester. 

 A. improve B. improvement     C. improvably D. improvable

2. If you want to .................................. your English, we can help you.

A. improve B. improvement     C. improvably D. improvable

3.  He is very ................................. in taking care of animals.

A. experience B. inexperienced     C. experiences D. experienced

4. How can we make the subject more ................................... to young people?

A. interestingly B. interested    C. interesting D. uninteresting

5. He is a strict…………………………….….. 

A. examine B. examination     C. examinee D. examiner

6. I like watching the news because it is very ……………..………………………….

A. information B. informing     C. informative D. inform

7. The basement room is …………………………..from outside

8. Please give us all of your …………………………….

A. response B. responses      C. respond D. responsive

9. This remote area isn’t easily ...................................by bicycle.

A. access B. accessive     C. inaccessive D. accessed

10. The Internet has ...................................developed nowadays. (

A. increased B. increasing     C. increasingly D. increase

5. Nowadays, viewers can watch a variety of local and international programs on different _______.

            A. channels                           B. remote controls                C. forums                               D. languages

6. He had no qualifications.           , he got the jobs.

            A. Therefore              B. Moreover                          C. However                           D. So

7. Many of his most famous poems are     by the natural world.

            A. completed             B. composed                         C. instructed              D. inspired

8. If you wear the jeans too frequently, they will ____________ faster.

            A. go out                                B. come out                           C. run out                               D. wear out

9. “I’m worried about you, Joe,     ”.

            A. said the teacher   B. the teacher told    C. the teacher said him        D. told the teacher

10. The examiner asked me            I had passed any examination before.

            A. unless                                B. if                                         C. that                                     D. why

11. What                           of learning English do you find most difficult?

            A. activity                              B. program                             C. aspect                                D. opinion

12. “How long have you                this English course?” “Six months”

            A. learned                              B. attended                            C. gone                                               D. spoken           

13. – “Why don’t we have a look round the campus?” “                      ”

            A. Don’t ask me a silly question like that!          C. Yes, Why not?

            B. Do we?                                          D. It’s my pleasure.

14. – “Could you give please me some information about this job?” – “________”

            A. No, thanks.           C. Yes, congratulations!      B. Well done.            D. Yes, certainly.

ai cho em hỏi công thức tính thể tích khí sinh ra (đkc) là gì ạ

Câu 18: Cho 146 gam dung dịch HCl  50 % tác dụng vừa đủ với dung dịch Na₂CO₃ .  Tìm thể tích khí sinh ra ở ĐKC  (H=1, S=32 ,O=16 ,Na=23, C =12)

A.  44,8 l

B. 4,48 l

C. 22,4 l

D. 2,24 l

Câu 19: Cho 500 ml dung dịch NaOH 9 M tác dụng vừa đủ với dung dịch FeCl₃. Tìm khối lượng kết tủa thu được sau phản ứng (Fe=56 ,O=16 ,H=1, Cl=35,5. Na=23)

A. 1,605 g

B. 16,05 g

C. 160,50 g

D. 96,3 g

Câu 20: Nhiệt phân hoàn toàn  174g Mg(OH)₂. Tìm khối lượng chất rắn thu được sau phản ứng (Mg=24 ,O=16, H=1):

A. 120 g

B. 12 g

C. 6 g

D. 72 g

Câu 6: Cho sơ đồ phản ứng sau : Fe(OH)₃ → …….+ H₂O . Chọn phương trình hóa học thích hợp cho chuỗi phản ứng này:  

A. Fe(OH)₃ → FeO.+ H₂O

B. 2Fe(OH)₃ → Fe₂O₃.+ 3H₂  

C. 2Fe(OH)₃ →2 Fe .+ 3H₂O

D. 2Fe(OH)₃ → Fe₂O₃.+ 3H₂O

Câu 7: Kim loại Fe sẽ tác dụng được với dung dịch muối nào sau đây:

A. CuCl₂

B. MgCl₂

C. NaCl

D. BaCl₂

Câu 8: Dung dịch muối FeCl₂ sẽ tác dụng được với Kim Loại nào sau đây:

A. Cu

B. Mg

C. Ag

D. Pb

Câu 9: Dung dịch muối FeCl₂ sẽ tác dụng được với Base nào sau đây (ở điều kiện thích hợp):

A. NaOH

B. Cu(OH)₂

C. Mg(OH)₂

D. Zn(OH)₂ 

Câu 10: Base nào sẽ bị nhiệt phân:  

A. NaOH

B. KOH

C. Ba(OH)₂

Fe(OH)₂