Sắp xếp câu

Chia động từ trong ngoặc

80. He (start)....................learning English when he was in grade 3.

81. The (be)......................readyin a moment. Let’s wait for them.

82 – 83. It (be)....................2 years since he (leave)......................school.

84. We (do)..................an experiment in the lab when the lights went out.

85. Many years (pass)................since the day you went away.

86. Excuse me! But you (sit)....................at my place.

87.They (watch)..................TV at 8 o’clock last night.

88. We (take).....................part in an Engish-speaking contest last week.

89. This is the first time I (see)..................such a mess in my life.

90. Lie down for a while and you (feel)..................better.

91. Why are you under the table? You (look)............for something?

92. Mr. Ba (just/repair)................the computer for me.

93. When I arrived at the station, my friends (wait)...................for me.

94. Please don’t touch anything before the police (come)......................

95. Remember (close).......................the door before going out.

96. Millions of people (visit).................the new museum so far.

97. Where did you go while I (speak)...............yesterday?

98. Hurry up! The train (come).................in.

99. They (watch)................a fashion show on  TV when their parents got back.

100. You (get)......................nothing if you are lazy.

               Giải giúp mik nha! Thank you

Ex1. Điền từ để hỏi thích hợp vào các câu sau.
1. What time do your classes start? At seven o’clock.
2. How many floors does your house have? Two.
3. When does Nguyet have English? On Wednesday and Friday.
4. Where is her classroom? On the second floor.
5. What do they do after school? They do their housework.
6. What does his mother do? A doctor.
7. How old are the children? They are fine.
8. Where is she? In her room. 9. How many trees are there in your school yard? Fifteen
10.  Who are the boys? Hung and Son, my students
Ex2. Sắp xếp thành câu.
1. do /what/ you /time/ breakfast/ have/?
What time do you have breakfast?
 2. grade/ is/ he/ which /in/?
Which grade is he in?
 3. house /where/ her/ is/? 
Where is her house?
4. old /is/ brother/ your/ how? 
How old is your brother?
5. do/ in/ do/ the/ morning/ what/ they/? 
What do they do in the morning?
6. how/ are/ in/ there/ chairs/ room/ his/ many/? 
How many chairs are there in his class?
7. does/ have/ Literature/ when/ she/? 
When does she have Literature?
8. time/ start/ your/ what/ class/ does/? 

What time does your class start?
9. on/ what/ Minh/ Tuesday/ have/ does/?
What does Minh have on Tuesday?
10. pencils/ Huong/ many/ does/ have/ how/? 
How many pencils does Huong have?
11. you/ what/ time/ do/ school/ to/ go/?
What time do you go to school?
12. after/ what/ do/ school/ Lan/ do/ and/ brother/ her/? 
What do Lan and her brother do after school?

37. B          38. C          39. A          40. D

Một vật có khối lượng 600g treo vào lò xo, khi đó lò xo dài 25cm. Treo một vật khác có khối lượng 300g vào lò xo trên, lò xo dài 23 cm. Hỏi treo cả 2 vật vào thì lò xo dài bao nhiêu ?