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

A. nature

B. natural

C. naturalized

D. naturally

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

A. A

B. An

C. The

D. x

Câu 2: People are destroying the air by adding ...... to it.

A. pollutants

B. polluters

C. pollution

D. polluted

Câu 3: The leopard is _________ the threat of extinction.

A. in

B. on

C. under

D. below

Câu 4: I would like to send these letters …………………..air mail.

A. in

B. with

C. by

D. over

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

A. to

B. of

C. in

D. with

Câu 6: The waste from the chemical factory is extremely .......

A. harm

B. harmful

C. unharmed

D. harmless