Câu hỏi: 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 1: 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 2: They don't seem particularly worried about the situation.

A. concerned

B. pleased

C. frightened

D. excited

Câu 3: The plants and animals of the sea fall into three major groups.

A. small

B. chief

C. minor

D. main

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

A. bettered

B. born

C. safeguarded

D. taught

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

A. windy

B. freezing

C. cold

D. hot

Câu 6: How different a picture we now have of the ocean as the sea has begun to reveal its secrets.

A. public

B. opening

C. knowledge

D. schooling