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

A. attraction

B. worry

C. disinterest

D. careless

Câu 1: We know not what is good until we have lost it.

A. find

B. count

C. guess

D. learn

Câu 2: They don't seem particularly worried about the situation.

A. concerned

B. pleased

C. frightened

D. excited

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

A. short

B. prolonged

C. high

D. crooked

Câu 4: Fish only species that are not of concern, threatened or endangered.

A. bettered

B. born

C. safeguarded

D. taught

Câu 5: 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 6: She had a cozy little apartment in Boston.

A. uncomfortable

B. dirty

C. lazy

D. warm