Câu hỏi: Deforestation _________ destroying Earth’s plant and animal variety.

A. are

B. be

C. is

D. being

Câu 1: A hydroelectric dam ______________ in this area now.

A. is building

B. is being built

C. build

D. was built

Câu 2: The two children blamed each other ...... the window.

A. to break

B. breaking

C. for breaking

D. having broken

Câu 3: ……………fax transmission is commonly used in most offices.

A. A

B. An

C. The

D. x

Câu 4: The campaign will hopefully ensure the survival ...... the tiger.

A. of

B. for

C. to

D. on

Câu 5: The ...... friendly products are designed not to harm the natural environment.

A. environment

B. environmental

C. environmentally

D. environmentalism

Câu 6: The panda's ...... habitat is the bamboo forest.

A. nature

B. natural

C. naturalized

D. naturally