The reason why women and blacks play down their visibility is that they ______.

Hardly ______ down ______ the phone rang.

When _________a hill, the driver should build up speed early in order to cut down gasoline consumption.

37． —I’ve given all my pocket money to the people in Yushu．—_________I hope they can get over the difficulties they are meeting．

If you ___________ in the exam, you will let your parents down.

Cut________after the class was over．

If people ________ cutting down the forest, they will have nowhere _______.

People have _____________ poverty and now they live happy lives.

They claim that 1,000 factories closed down _____ during the economic crisis.

As regards putting an end to people’s littering in the forest, the writer feels ______.

______ they to cut down the cost of advertising, the cost of production ______ significantly fall.

Hardly _____ the TV _____the electricity was cut off.