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

A. find

B. count

C. guess

D. learn

Câu 1: Keep only fish that you will eat; release the rest.

A. catch

B. hold

C. take

D. have

Câu 2: Fish only species that are not of concern, threatened or endangered.

A. bettered

B. born

C. safeguarded

D. taught

Câu 3: One in seven accidents is caused by sleepy drivers.

A. awake

B. unwell

C. exhausted

D. talkative

Câu 4: The plants and animals of the sea fall into three major groups.

A. small

B. chief

C. minor

D. main

Câu 5: It's cool and quiet everywhere except in the kitchen.

A. windy

B. freezing

C. cold

D. hot

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

A. attraction

B. worry

C. disinterest

D. careless