Với a \(a\le0,tính\sqrt{\dfrac{-2a}{3}}.\sqrt{\dfrac{-3a}{8}}\)

1/ Although he is intelligent, he can’t get the highest marks in class.

A. In spite of his intelligence, he can’t get the highest marks in class.

B. Despite of being intelligence, he can’t get the highest marks in class.

C. Despite the fact that he intelligent, he can’t get the highest marks in class.

D. In spite of the fact that he is intelligence, he can’t get the highest marks in class.

2/ "You can come and stay with me if you are in London", he said to me.

A. He said you could come and stay with him if you were in London.

B. He said I could come and stay with him if I were in London.

C. He said you can come and stay with him if you are in London.

D. He said I can come and stay with him if I am in London.

Choose A, B, C or D to indicate the underlined part that needs correction in the following question.
1/ We have to submit our assignment by Friday, haven’t we?                  

2/ The teacher asked me whether had I done my homework.

Oxit tác dụng với nước tạo dung dịch làm quì tím chuyển đỏlà
A. Fe2O3    B. P2O5     C. CuO             D. BaO

Match the phrasal verbs on the left with its opposite meaning on the right.

slow down(vehicle)                        dress down
turnup(radio,tv etc.)                        take off 
checkout (hotel)                             come back
dress up (clothes)                          turn down
get on (bus,train)                           let down
put on (clothes)                              knock out
go away (leave)                              check in
brind round (make sb conscious)   pick up 
take up (shorten)                            speed up
put down (on the ground)                get off