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He found it hard ________(catch)up with his class．

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It seems that you spend a lot of time ________(play)football．

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The teacher ________(come)in, while we were talking．

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Don’t ________(quarrel)with your friends and relatives．

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Parents may not ________(think)________(watch)TV very useful．

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If you don’t know how ________(work)it out, please ________(write)to me．

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Make a plan before you start ________(work)．

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When you ________(finish)your exercise hand it in to your teacher．

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Remember ________(not make)a kite for Beibei so that she must study hard．

用所给动词的适当形式填空

She can’t decide where ________(spend)her holiday．