New Words：

switch [swɪtʃ]
n.转换, 开关
v.改变, 交换, 转换

Sample Sentences：

Do you mind if I switch the radio off?
They switched the train to the other track.
The dates of the last two exams have been switched.
Do you think she'll notice if I switch my glass with hers?

I wish to turn on the light, where is the switch?
Can you reach the light switch from where you're sitting?

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