A lot of people could fall ill after drinking contaminated water.

单选题

In some countries there are a lot of young people now need_______teeth.

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单选题

Because of lack of proper education, a lot of local people are _____; some of them can’t even write their own names.

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单选题

The British people and the American people not only speak the same language but ____a lot of special customs as well.

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---What‘s the problem, Vincent? ---Although my company has made a lot of money, it ______ that the people are working hard, but they are unhappy.

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单选题

Corrosion can have a lot of causes.

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