题文
They must have been enjoying themselves there, otherwise they ________so long.
| A．can’t have stayed |
| B．wouldn’t have stayed |
| C．needn’t have stayed |
| D．couldn ’t stay |
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They must have been enjoying themselves there, otherwise they ________so long.
| A．can’t have stayed |
| B．wouldn’t have stayed |
| C．needn’t have stayed |
| D．couldn ’t stay |
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