Câu hỏi: You must have forgotten to send the email, ________ there’s nothing in my inbox.

A. because of

B. for

C. due to

D. owning to

Câu 1: My little girl is tired now because she ________ all day.

A. studies

B. studied

C. has been studying

D. has studied

Câu 2: ________________________, he left the hall quickly.

A. Not be rewarded with a smile

B. Not rewarding with a smile

C. Not having rewarded with a smile

D. Not being rewarded with a smile

Câu 3: Scientists have invented walls and windows that can block out the noise, which allows individuals to focus on their work without ________.

A. be disturbed

B. disturbing

C. being disturbed

D. being disturbing

Câu 4: New sources of energy have been looking for as the number of fossil fuels continues to decrease.

A. New sources

B. been looking

C. fossil

D. continues

Câu 5: “I’m sorry I gave you the wrong number”, said Paul to Susan.

A. Paul apologized to Susan for having given the wrong number.

B. Paul accused Susan of having given him the wrong number.

C. Paul thanked to Susan for giving the wrong number.

D. Paul denied giving Susan the wrong number.

Câu 6: Learning the language in the country in which it is spoken is, of course, a________ more effective and faster process than studying in your own country.

A. lots

B. far

C.  so

D. very