-Alvin, are you coming with us?
-I'd love to, but something unexpected __________.
| A．has come up | B．was coming up |
| C．had come up | D．would come up |
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-Alvin, are you coming with us?
-I'd love to, but something unexpected __________.
| A．has come up | B．was coming up |
| C．had come up | D．would come up |
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