Câu hỏi: 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 1: Blacken the letter A, B, C, or D on your answer sheet to indicate the word with the main stress different from that of the other three words in each question.

A. escape

B. before

C. enough

D. welfare

Câu 2: 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 3: As ________ in Greek and Roman mythology, harpies were frightful monsters that were half woman and half bird.

A. description

B. describing

C. to describe

D. described

Câu 4: 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 5: ________ at the airport more early, he would have met his friend.

A. Then he arrived

B. Had he arrived

C. When he arrived

D. He has arrived

Câu 6: My little girl is tired now because she ________ all day.

A. studies

B. studied

C. has been studying

D. has studied