题目内容
20．When you ________ the air conditioning in summer，pleade keep the temperatureabove 26℃．（ ）
| A． | turn off | B． | put on | C． | turn on | D． | put off |
分析 当你在夏季打开空调时，请保持温度在26℃以上．
解答 答案：C；turn off，关上；put on，穿上；turn on，打开；put off，延期；根据句中信息in summer推测句意为：打开空调；故选C．
点评 了解每个选项的含义是做好此类题型的关键，还要从句意着手，根据句意作出解答；所以，平时的学习中要多掌握短语的用法，才能很好的完成．
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