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

A. small

B. chief

C. minor

D. main

Câu 1: The business was acquired from Orion four years ago.

A. before

B. later

C. ahead

D. last

Câu 2: The speaker likes to have an attentive audience.

A. neglecting

B. positive

C. active

D. interested

Câu 3: We know not what is good until we have lost it.

A. find

B. count

C. guess

D. learn

Câu 4: Keep only fish that you will eat; release the rest.

A. catch

B. hold

C. take

D. have

Câu 5: The wise man has long ears and a short tongue.

A. short

B. prolonged

C. high

D. crooked

Câu 6: 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