Câu hỏi: Advanced students need to be aware of the important of collocation.

A. of high level

B. of great important

C. of low level

D. of steady progress

Câu 1: How different a picture we now have of the ocean as the sea has begun to reveal its secrets.

A. public

B. opening

C. knowledge

D. schooling

Câu 2: Use water sparingly and keep water clean.

A. dusty

B. dirty

C. wicked

D. halfway

Câu 3: They don't seem particularly worried about the situation.

A. concerned

B. pleased

C. frightened

D. excited

Câu 4: At times, this can be risky, and the keepers have been injured and one has been killed.

A. good

B. useful

C. healthy

D. secure

Câu 5: There is growing concern about the way man has destroyed the environment.

A. attraction

B. worry

C. disinterest

D. careless

Câu 6: We know not what is good until we have lost it.

A. find

B. count

C. guess

D. learn