题目内容
5．Practicing in groups is good us to learn English．（ ）| A． | at | B． | in | C． | for |
分析 句意：小组合作练习对我们学习英语是有益的．
解答 答案：C
选项A 构成短语be good at，意思为"擅长"，不合句意；选项C构成短语be good for 意思为"对…有益"符合句意"小组合作练习对我们学习英语是有益的"，故选C．
点评 做题时注意根据语境选择适当的短语．
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