摘要: They must their air tickets 3 days before they leave.
网址:http://m.1010jiajiao.com/timu_id_2295056[举报]
—You _____ wash your shoes, Tom.
—But I _____ do that, Mum. They aren’t dirty.
A. must; needn’t
B. must; mustn’t
C. mustn’t; needn’t
D. need; mustn’t
查看习题详情和答案>>-- ______ you finish your homework in time?
-- I'm afraid ______!
[ ]
A. Must, needn't B. May, mustn't C. Can, can't D. Can, not
查看习题详情和答案>>
—________ I come back before five o’clock?
—No, you ________. But you ________ be back later than seven o’ clock.
A. Need; must; mustn’t B. May; mustn’t; can’t
C. Can; can’t; can’t D. Must; needn’t; can’t
查看习题详情和答案>>