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

A. bettered

B. born

C. safeguarded

D. taught

Câu 1: Use water sparingly and keep water clean.

A. dusty

B. dirty

C. wicked

D. halfway

Câu 2: The plants and animals of the sea fall into three major groups.

A. small

B. chief

C. minor

D. main

Câu 3: They don't seem particularly worried about the situation.

A. concerned

B. pleased

C. frightened

D. excited

Câu 4: He had never experienced such rudeness towards the president as it occurred at the annual meeting in May.

A. thought

B. hostility

C. care

D. politeness

Câu 5: Last night they stayed at home and watched TV.

A. day

B. noon

C. midnight

D. morning

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