摘要：( ). Must the trees be planted at once ? No ,they . A. mustn’t . B. must . C . need . D. need .n’t
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—________I do the laundry first, Mum?
—No, you ________. You can do your homework first.
A．Must; mustn’t B．Can; mustn’t C．Must; needn’t D．May; needn’t
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--The man in a black suit _______ be our youth worker.
--- I’m sure it _______ be him. I saw him in the laboratory building some minutes ago.
| A．must; can’t | B．can; mustn’t | C．can; could | D．must; won’t |
— _______ we clean the classroom at once?
— No, you _______. You _______ clean it after school.
|
A．Must; needn’t; may |
B．Must; mustn’t; can. |
C．Shall; can’t; must |
D．Need; mustn’t; may |
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---________ we clean the classroom at once?
---No, you________. You ________clean it after school
|
A．Must, needn’t, can |
B．Need, mustn’t ,may |
|
C．Must, mustn’t, can |
D．Shall, can’t , may |
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