This machine __________ It has worked for years.
| A．didn’t work |
B．wasn’t working |
C．doesn’t work |
D．isn’t working |
What would have happened ________，as far as up to the river bank.
| A．Bob had walked farther |
| B．if Bob should walk farther |
| C．had Bob walked farther |
| D．if Bob walked farther |
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 |