Câu hỏi: What about ___________ the solution together this afternoon?

A. find

B. finding

C. to find

D. to finding

Câu 1: People are destroying the air by adding ...... to it.

A. pollutants

B. polluters

C. pollution

D. polluted

Câu 2: The ...... friendly products are designed not to harm the natural environment.

A. environment

B. environmental

C. environmentally

D. environmentalism

Câu 3: The waste from the chemical factory is extremely .......

A. harm

B. harmful

C. unharmed

D. harmless

Câu 4: I don't remember ...... of the decision to change the company policy on vacations. When was it decided?

A. telling

B. being told

C. to tell

D. to be told

Câu 5: It is possible for local wildlife to coexist ...... industry.

A. to

B. of

C. in

D. with

Câu 6: The boy found a wallet in the street, and then he ...... to return it to the loser.

A. tried

B. had tried

C. was trying

D. had been trying