4. Have you ever ...........to Sapa?

A. went                  B. go                  C. goes               D. gone

5. They have decided to clean up the neighbor hood ...............it is full of rubbish.

A. so                       B. but                     C. because            D. although

6. How many novels ..............Charles Dickens so far?

A. does -write     B. did-write        C. did written      D. have-written

I. Choose the best answer (A, B, C or D).

1.  She .................. clothes twenty times so far.

A. donates            B. has donated      C. is donating         D. to donate

2.We came to the mote village and   ............meals for homeless children.

A. cook                  B. offered              C. do                     D. made

3.You should think of ...............the volunteer activities in your community.

A. taking in             B. making              C. participating   D. taking part in

D

Câu 10: Tại sao trên xe ô tô, xe máy người ta lắp một gương cầu lồi phía trước người lái xe để quan sát phía sau mà không lắp một gương phẳng.