Câu hỏi: If there is a mechanical problem, we suggest ______ the manufacturer directly.

A. contact

B. contacting

C. to contact

D. be contacted

Câu 1: I’ll be in trouble if I _________my passport.

A. lose

B. will lose

C. lost

D. would lose

Câu 2: Do you find the internet ______, Nam?

A. use

B. used

C. useful

D. usefully

Câu 3: Would you mind not _______ on the radio until I’ve finished typing the document?

A. to turn

B. turning

C. being turned

D. to be turned

Câu 4: Some scientists say that flying saucers might be people's______

A. imagination

B. imagine

C. imaginative

D. imaginary

Câu 5: My father_________ teaching in a small village 10 years ago.

A. is starting

B. started

C. starts

D. has started

Câu 6: The teacher asked her why she______the test.

A. didn’t do

B. doesn’t do

C. won’t do

D. can’t do