Câu hỏi: This vertical section of the soil shows four basic soil layers.

A. visible

B. important

C. necessary

D. horizonal

Câu 1: Her eyes were hurting from the bright lights.

A. dark

B. light

C. heavy

D. low

Câu 2: To be prepared for war is one of the most effectual means of preserving peace.

A. best

B. worst

C. fastest

D. least

Câu 3: China has become the third country in the world which can independently carried out the manned space activities.

A. put up

B. put in

C. put on

D. put off

Câu 4: The next day the union voted to begin an indefinite strike.

A. make

B. end

C. start

D. light

Câu 5: I think we've chosen the right person to lead the expedition.

A. alright

B. left

C. wrong

D. true

Câu 6: If you are not inside a house, you do not know about its leaking.

A. upon

B. outdoors

C. outside

D. near