题文
—Can we run across the road now？
—No，we ________．We have to wait until the light turns green．
| A．needn’t |
| B．mustn’t |
| C．couldn’t |
| D．shouldn’t |
—Can we run across the road now？
—No，we ________．We have to wait until the light turns green．
| A．needn’t |
| B．mustn’t |
| C．couldn’t |
| D．shouldn’t |
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