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

A. find

B. count

C. guess

D. learn

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: The business was acquired from Orion four years ago.

A. before

B. later

C. ahead

D. last

Câu 3: Rich families find it easier to support their children financially.

A. Wealthy

B. Well-off

C. Privileged

D. Poor

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

A. kick

B. shoot

C. throw

D. destroy

Câu 5: It's too far to ride to your grandmother's; you'd better take the bus.

A. remote

B. near

C. fast

D. besides

Câu 6: Keep only fish that you will eat; release the rest.

A. catch

B. hold

C. take

D. have