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

A. harm

B. harmful

C. unharmed

D. harmless

Câu 1: Could you please provide us ……………..some more modern equipment?

A. for

B. by

C. in

D. with

Câu 2: The campaign will hopefully ensure the survival ...... the tiger.

A. of

B. for

C. to

D. on

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

A. in

B. on

C. under

D. below

Câu 4: Let’s _________ water by turning off tapes when not using.

A. save

B. to save

C. saving

D. saved

Câu 5: Laura reminded her roommate ...... her alarm clock for 6:00.

A. to set

B. setting

C. to be set

D. of setting

Câu 6: A hydroelectric dam ______________ in this area now.

A. is building

B. is being built

C. build

D. was built