词汇运用，根据句意，写出括号内所给单词的适当形式：

His poor memory is really a ________(advantage)to him．

词汇运用，根据句意，写出括号内所给单词的适当形式：

Sometimes, it is very difficult to make correct ________(decide)．

动词填空

Before our teacher reminded us, we ________(send)the e-mails．

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He promised us that she ________(tell)him about the event at the proper time, but actually(事实上)she didn't．

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Fifty students have entered the writing competition since it ________(hold)for the first time．

动词填空

Boys and girls, please read the guidebook carefully, or you ________(get)lost during the visit．

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It is said that he devoted much of his time to ________(write)his new novel．

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－It seems that you know a lot about the story．

－Well．We ________(read)it many times．

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All the rules must ________(explain)to the players clearly before the game starts．

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You had better ________(not laugh)at others because everybody makes mistakes．