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【题目】Chatting online can be _____fun, but kids must be sure they stay safe on _____web.

A. 不填; the B. a; the

C. 不填; a D. a; a

【答案】A

【解析】

考查冠词。句意:网上聊天可能很有趣,但是必须确保孩子们在网上安全。第一个空fun是形容词,用作be动词后的表语,不用冠词;on the web是固定短语,意思是在互联网上,所以第二个空填定冠词the,故选A。

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