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

A. find

B. count

C. guess

D. learn

Câu 1: We can do something to save the earth.

A. kick

B. shoot

C. throw

D. destroy

Câu 2: Keep only fish that you will eat; release the rest.

A. catch

B. hold

C. take

D. have

Câu 3: The wise man has long ears and a short tongue.

A. short

B. prolonged

C. high

D. crooked

Câu 4: Use water sparingly and keep water clean.

A. dusty

B. dirty

C. wicked

D. halfway

Câu 5: I love it when someone's laughter is funnier than the joke.

A. cry

B. shout

C. smile

D. frown

Câu 6: Kevin stopped to buy the evening paper from a news vendor.

A. purchase

B. get

C. sell

D. give