【題目】It's a pity that some students waste energy _________ on line.

A.to chatB.chattingC.chatD.to chatting

【答案】B

【解析】

句意:很遺憾有些學生浪費精力在網(wǎng)上聊天。

考查非謂語。to chat聊天,動詞不定式;chatting聊天,現(xiàn)在分詞或者動名詞形式;chat聊天,動詞原形;to chatting聊天,介詞+動名詞形式;根據(jù)句子結(jié)構分析可知,這里表達的是“浪費精力做某事”,英語是waste energy in doing sth,所以這里應該用doing形式,故選B

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