Câu hỏi: I was very sad when the vet said he’d have to _____ Gertie, our lapdog.

A. put down

B. fell up to

C. pull through

D. wear off

Câu 1: My father is in_______ of 30 engineers and 80 workers.

A. pressure

B. leadership

C. impression

D. charge

Câu 2: We were quite impressed by the ______ students who came up with the answer to our question almost instantly.

A. absent-minded

B. big-headed

C. quick-witted

D. bad-tempered

Câu 3: I’m a great believer in the _____ of reading books and taking up a sport, which offer you both knowledge and healthy.

A. benefits

B. exercises

C. practices

D. points

Câu 4: His work ______ new ground in the treatment of cancer. It is now giving many cancer victims hope of complete recovery.

A. broke

B. found

C. dug

D. uncovered

Câu 5: Daisy has spent the last two weekends _____ hundreds of photographs so that she can put them in separate albums.

A. playing at

B. sorting out

C. cutting off

D. filling up

Câu 6: The world’s biodiversity is declining at an unprecedented rate, which makes wildlife ________.

A. prosperous

B. vulnerable 

C. prefect

D. remained