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: The business was acquired from Orion four years ago.

A. before

B. later

C. ahead

D. last

Câu 2: Rich families find it easier to support their children financially.

A. Wealthy

B. Well-off

C. Privileged

D. Poor

Câu 3: Use water sparingly and keep water clean.

A. dusty

B. dirty

C. wicked

D. halfway

Câu 4: We can do something to save the earth.

A. kick

B. shoot

C. throw

D. destroy

Câu 5: Keep only fish that you will eat; release the rest.

A. catch

B. hold

C. take

D. have

Câu 6: The plants and animals of the sea fall into three major groups.

A. small

B. chief

C. minor

D. main