— Alvin，are you coming with us?
—I'd love to，but something unexpected ________.
A．has come upB．was coming up
C．had come upD．would come up
A
考查動詞的時態(tài)。句意：——Alvin，你會跟我們來嗎？——我想去，但出了點沒料到的事情。此處表示已發(fā)生的情況對現(xiàn)在的影響(我去不了了)，所以用現(xiàn)在完成時。
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