I ________ use a clock to wake meup because at six o’clock each morning the train comes by my house.
| A．couldn’t |
| B．mustn’t |
| C．shouldn’t |
| D．needn’t |
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I ________ use a clock to wake meup because at six o’clock each morning the train comes by my house.
| A．couldn’t |
| B．mustn’t |
| C．shouldn’t |
| D．needn’t |
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