Câu hỏi: 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 1: One in seven accidents is caused by sleepy drivers.

A. awake

B. unwell

C. exhausted

D. talkative

Câu 2: We can do something to save the earth.

A. kick

B. shoot

C. throw

D. destroy

Câu 3: It's cool and quiet everywhere except in the kitchen.

A. windy

B. freezing

C. cold

D. hot

Câu 4: We know not what is good until we have lost it.

A. find

B. count

C. guess

D. learn

Câu 5: It is easy to open a shop but hard to keep it always open.

A. welcome

B. appear

C. switch

D. close

Câu 6: There is growing concern about the way man has destroyed the environment.

A. attraction

B. worry

C. disinterest

D. careless