题目内容
1.You'd better thinktwice (two) before you take the final action.分析 在你做最后决定前你最好三思.
解答 twice两次,think twice三思,再三考虑,固定短语,与后面的take the final action"采取最后行动"相呼应,故填twice.
点评 此题考查数词的用法,先理解句意,再根据所给词来判定要用什么形式.
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