Câu hỏi: 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 1: 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 2: I feel that learning English will help my chances of promotion at work.

A. improve

B. minimize

C. widen

D. facilitate

Câu 3: Man alone is born crying, lives complaining, and dies disappointed.

A. together

B. lonely

C. altogether

D. total

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 too far to ride to your grandmother's; you'd better take the bus.

A. remote

B. near

C. fast

D. besides

Câu 6: Fish only species that are not of concern, threatened or endangered.

A. educated

B. healed

C. defended

D. brought