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题型：单选题题类：真题难易度：困难

The exhibition tells us ______ we should do something to stop air pollution.

A、where B、why C、what D、which

举一反三

It is generally considered unwise to give a child _____ he or she wants.

（2015·重庆）We must find out ____ Karl is coming, so we can book a room for him.

The researchers who study jokes want to find out _______ people from different nations and cultures find funny.

After months of voyage, Columbus arrived in_____ later proved a new continent.

She was so angry at ________ he was doing ________ she stayed up all night.

A Chinese lady asked a clerk by putting both hands up and {#blank#}1{#/blank#}(say) "Moo! Moo!". The lady got {#blank#}2{#/blank#} she wanted even without saying a word of English.

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