________，he talks a lot about his favorite singers after class.
| A．A quiet student as he may be |
| B．Quiet student as he may be |
| C．Be a quiet student as he may |
| D．Quiet as he may be a student |
I am thankful to him for that advice, I owe all my success．
| A．to what | B．of which | C．at which | D．to which |
If has been raining days．
| A．these all last few | B．these last few all |
| C．all these last few | D．these last all few |
If I had worked harder at school, I in a comfortable office now．
| A．would sit | B．would have sat | C．would be sitting | D．were sitting |
twice a year, whether it is a car or a bus or a truck, is the rule that every driver must obey in this city．
| A．Examining | B．Examined | C．Being examined | D．Having been examined |
, he wanted to buy his son a cheap toy for his birthday．
| A．As he is short of money | B．He was short of money |
| C．Short of money as he was | D．As was he short of money |