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

A. pollutants

B. polluters

C. pollution

D. polluted

Câu 1: ……………fax transmission is commonly used in most offices.

A. A

B. An

C. The

D. x

Câu 2: I threw my old trainers and bought some new .................. .

A. ones

B. one

C. some

D. any

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

A. harm

B. harmful

C. unharmed

D. harmless

Câu 4: The leopard is _________ the threat of extinction.

A. in

B. on

C. under

D. below

Câu 5: The panda's ...... habitat is the bamboo forest.

A. nature

B. natural

C. naturalized

D. naturally

Câu 6: The two children blamed each other ...... the window.

A. to break

B. breaking

C. for breaking

D. having broken