题目内容
11．It is a good time _____．（ ）| A． | sing | B． | to sing | C． | singing | D． | sang |
分析 这是个唱歌的好时间．
解答 正确答案：B．sing是唱歌，A是其动词原形，B是动词不定式，C是现在分词，D是动词过去式．句意是"这是个唱歌的好时间．"，其中it is a good time to do sth．表示是做某事的好时间，动词不定式作定语．
点评 本题考查动词不定式，基础题，记住常用的句型结构是解题的关键．
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