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

A. prosperous

B. vulnerable 

C. prefect

D. remained

Câu 1: Make sure you ______ up the data on your computer, because you might get a virus.

A. back

B. store

C. save

D. copy

Câu 2: Silence __________ the theatre as the audience awaited the opening curtain with expectation and excitement.

A. fell in with

B. came between

C. hung over

D. dropped out of

Câu 3: Please don’t ______ a word of this to anyone else, it’s highly confidential.

A. speak

B. pass

C. mutter

D. breathe

Câu 4: 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 5: My father is in_______ of 30 engineers and 80 workers.

A. pressure

B. leadership

C. impression

D. charge

Câu 6: A true relationship is thought to be a friendship that may__________through changes in the lives of the friends.

A. entail

B. remain

C. endure

D. continue