Don’t forget to turn on your radio at 7 p.m. this evening. We’ll be back _______
题型：不详难度：来源：
Don’t forget to turn on your radio at 7 p.m. this evening. We’ll be back _______ then.| A．in the air | B．by air | C．on the air | D．off the air |
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答案
| C |
解析
| 这题考查介词短语，in the air在空中，by air乘飞机，on the air在播放 ，句意是：别忘了今晚7点打开收音机，那时我们将回来播放。选C。 |
举一反三
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