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

A. environment

B. environmental

C. environmentally

D. environmentalism

Câu 1: The two children blamed each other ...... the window.

A. to break

B. breaking

C. for breaking

D. having broken

Câu 2: ……………fax transmission is commonly used in most offices.

A. A

B. An

C. The

D. x

Câu 3: People are destroying the air by adding ...... to it.

A. pollutants

B. polluters

C. pollution

D. polluted

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

A. harm

B. harmful

C. unharmed

D. harmless

Câu 6: What about ___________ the solution together this afternoon?

A. find

B. finding

C. to find

D. to finding