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题型：单选题题类：模拟题难易度：普通

Even a drop of water ______because it is so important to all the living things.

A、must waste B、must be wasted C、mustn't waste D、mustn't be wasted

举一反三

It's difficult for the village children to cross the river to get to school. We think a bridge_______over the river.

His room needs so be must have it .

Children to watch thrillers. They may have a bad influence on children.

The television ________. It doesn't work now.

Children shouldn't be{#blank#}1{#/blank#}(允许)to ride alone on the road.

— Mum, can I drive my father's car to the cinema?

— No way! You should not ________________ to drive, because you don't have a driver's license.

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