---Must I clean the floor now?
---__________. It is too dirty.
| A．Yes, you needn’t | B．No, you needn’t |
| C．No, you mustn’t | D．Yes, you must |
---Must I clean the floor now?
---__________. It is too dirty.
| A．Yes, you needn’t | B．No, you needn’t |
| C．No, you mustn’t | D．Yes, you must |
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