2 . One s____________ and you could fall off the cliff. (根据首字母单词拼写)

5 . Let us go out for a rest, ________（用恰当的附加疑问句填空）

6 . Before we start, please come to the front one by one and introduce yourself to the class.（英译汉）

8 . 据说，这个座右铭是20世纪90年代引入我公司的，是吗? (motto)
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9 . 短文改错

Leaving a store，I returned to my car only to find I have locked my keys and cell phone inside. The teenager riding his bike learnt about my embarrassed situation. I told him that even if I could call my wife，she wouldn't bring him the car key because she was quite busy then. He handed me with his cell phone，"Calling your wife and tell her I'm going to get the key." "That was a ten-mile round trip，"I said. But he told me not worry about it. An hour late，he returned with the key. I offered him some money，so he refused，"Let's just say I need the exercise."