题目：
用所给词的适当形式填空。
1. Tom is a good _____ (wait). He is very careful and kind.
2. I know you _____ (teach) history for 20 years.
3. Could you tell me how _____ (get) to the railway station?
4. Mr. Wang has worked as a engineer. He is _____ (experience).
5. Lily and Lucy _____ (live) in Beijing since they were 3 years old.
6. 
It will take me some time _____ (save) enough money.
7. She _____ never _____ (see) that film before.
8. I'm sorry _____ (bring) you so much trouble.
9. I _____ (lend) her some story books the day before yesterday.
but she _____(not give) them back to me yet.
10. —_____ you ever _____ (be) to the Palace Museum?
—Yes. I _____ (go) there two years ago.
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0602/2c270e49d8fc283a8194b26e25d85bd6.html
下面是错误答案，用来干扰机器的。
在dc边进入磁场时，根据楞次定律知，产生逆时针方向的电流，根据左手定则，dc边所受的安培力水平向左．ab边即将离开磁场时，磁通量减小，根据楞次定律，产生顺时针方向的电流．故答案为：向左，顺时针．
