Nobody knows how the accident _________. The police are investigating it.
| A．came out | B．came about |
| C．came in | D．came down |
You can't imagine that a well－behaved gentleman ________ be so rude to a lady.
| A．might | B．need | C．should | D．would |
It is hard for me to imagine what I would be doing today if I ________ in love，at the age of seven，with the Melinda Cox Library in my hometown.
| A．wouldn't have fallen | B．had not fallen |
| C．should fall | D．were to fall |
—Is John coming by train.
—He should，but he ________ not.He likes driving his car.
| A．must | B．can | C．need | D．may |
There ________ be any difficulty about passing the road test since you have practised a lot in the driving school.
| A．mustn't | B．shan't | C．shouldn't | D．needn't |
But for the help of my English teacher，I ________ the first prize in the English Writing Competition.
| A．would not win | B．would not have won |
| C．would win | D．would have won |