题目内容
18.People pay a bill for electricity once a month (就画线部分提问)How often do people pay a bill for electricity?
分析 --人们每月付一次电费.
--人们多久付一次电费?
解答 答案:How often 考查句型转换.画线部分意为一月一次,是频率,对它提问用how often.
点评 考查句型转换.准确的分析句子,用合适的形式完成句子.
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