题文
Must I clean the room now？
No，you ________．You can do it later．（ ）
| A． |
needn't |
B． |
can't |
C． |
may not |
Must I clean the room now？
No，you ________．You can do it later．（ ）
| A． |
needn't |
B． |
can't |
C． |
may not |
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