We have heard of many cases _______ some citizens ，especially some famous people， have suffered because personal information had been leaked.
| A．why | B．which | C．as | D．where |
—I don't mind telling you what I know.
—You________. I'm not asking you for it.
| A．mustn't |
| B．may not |
| C．can't |
| D．needn't |
This cake is very sweet. You________a lot of sugar in it.
| A．should put |
| B．could have put |
| C．might put |
| D．must have put |
—Lucy doesn't mind lending you her dictionary.
—She________. I have borrowed one.
| A．can't |
| B．mustn't |
| C．needn't |
| D．shouldn't |
He________have completed his work; otherwise, he wouldn't be enjoying himself by the seaside.
| A．should |
| B．must |
| C．wouldn't |
| D．can't |
He paid for a seat, when he________have entered free.
| A．could |
| B．would |
| C．must |
| D．need |