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题型：单选题题类：常考题难易度：普通

What on ____ earth are you doing under such ___ burning sun? Go indoors.

A、the; the B、an; a C、/; / D、/; a

举一反三

Jane's grandmother had wanted to write children's book for many years, but one thing or another always got in way.

China is seeing ______ growing trend in the number of people owning pets and ______ recent survey finds that one in 13 Chinese now keep animals.

American films always have ______ edge on foreign films at ______ Oscars, regardless of how popular a foreign film might be.

In communication, a smile is usually ________ strong sign of a friendly and ________ open attitude.

The biggest whale is ________ blue whale，which grows to be about 29 meters long—the height of ________ 9-storeyed building.

They chose Tom to be ___captain of the team because they knew he was __smart leader.

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