Ⅱ．单项选择（满分20分）
21. Nowadays many young people get into ____ habit of smoking in ____ public and can't kick it.
| A．the; the | B．/ ;/ | C．/ ;the | D．the;/ |
---Would you please show me ___ to run the machine?----Sure.
| A．which | B．what | C．how | D．when |
Great changes ___ in the recent years.
| A．are taking their place | B．have taken place | C．have been taken place | D．take place |
The reason ___ he didn’t attend the meeting yesterday was ___ his child had fallen ill.
| A．that, why | B．why, that | C．why, why | D．that, that |
The old man ___ us interesting stories when we were young.
| A．were used to tell | B．used to tell | C．got used to tell | D．used to telling |
You should learn from the others ___ you are.
| A．whatever | B．wherever | C．whenever | D．however |