题目内容
9．-Whois chatting（chat）on QQ？-I think Millie is．分析 --谁在QQ上聊天？
--我想是米莉．
解答 答案：is chatting 考查单词填空．根据题干中的is，可知时态是现在时，根据句意 谁在QQ上聊天？要用现在进行时完成句子，构成 是主语+be+doing，主语是who，系动词用is，chat的现在分词是chatting，故答案是 is chatting．
点评 本题考查用所给单词的适当形式填空，首先要根据语境明确句意，然后再根据相关语法对所给单词在形式上做出正确的变化．
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