Please open your book to lesson 11. 请翻到第十一课。
The whole class, please.全班请一起来。
If there's no volunteer, I'll pick someone.如果没有人毛遂自荐,我来选一位同学。
Come up and write it on the board到这里来把它写在黑板上。
John, come up and try it first.约翰,你先来试着做一做。
Let's move on. 我们继续吧。
Finish them in one minute一分钟之内完成。
You have three more minutes.你们还有三分钟。
Take your time.不着急.
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