It was during World War II, ____ he was in his early twenties, _____ he joined the British Army.
| A．that; when | B．when; that | C．when; when | D．that; that |
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 |
Research findings show we spend about two hours dreaming every night, no matter what we ______ during the day.
| A．should have done | B．would have done |
| C．may have done | D．must have done |
－I went to work on foot yesterday, though it ______ cats and dogs.
－You ______ by bus. It was likely to get a cold.
| A．is raining; must have gone | B．rained; would go |
| C．was raining; should have gone | D．have rained; could have gone |