The war against Iraq and the suffering _____caused have become a big concern all over the world.
| A．it | B．what | C．which | D．that |
After a knock at the door, the children heard his mother’s voice him．
| A．calling | B．called | C．being called | D．to call |
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 |