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题型：单选题题类：常考题难易度：困难

Mr. Wang made up his mind to devote all he could _____ his oral English before going abroad.

A、improve B、to improve　　 C、improving D、to improving

举一反三

It is every citizen's duty to d{#blank#}1{#/blank#} his country which is faced with danger.

He was busy writing a story, only ______ once in a while to smoke a cigarette.

The famous male singer {#blank#}1{#/blank#} (滥用)drugs, otherwise he wouldn't have been arrested.

After the dinner party, most guests left, with only two of them ________ in the host family, ________ him clear up.

I think the short stories ________ by Dickens are very popular ________ the children.

sweet, the food should be made by adding more sugar.

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