Please keep us __________ of any change of your address as soon as possible.
| A．informing |
| B．informed |
| C．being informed |
| D．to inform |
. I ______ pay Tom a visit, but I am not sure whether I will have time this Sunday.
| A．should | B．might | C．would | D．could |
－Mary didn’t turn up last time, did she?
－No. She ______ . We had changed our plan.
| A．shouldn’t have come | B．needn’t have to come |
| C．didn’t need to come | D．needn’t have come |
They must have finished the work by the end of last month, ______?
| A．mustn’t they | B．haven’t they | C．hadn’t they | D．didn’t they |
－I didn’t know you were good friends.
－You ______. I have known her since she moved here. You were studying abroad then.
| A．may have | B．needn’t have | C．couldn’t have | D．must have |
.－Is there any flight to Tokyo today?
－I think there ______, for the weather is too bad.
| A．mustn’t | B．mightn’t be | C．needn’t be | D．can’t be |