— Alvin，are you ing with us?
—I'd love to，but something unexpected .
A. has e up
B. was ing up
C. had e up
D. would e up
网友回答
(答案→)A. has e up
B. was ing up
C. had e up
D. would e up
解析：考查动词的时态。句意：——Alvin，你会跟我们来吗？——我想去，但出了点没料到的事情。此处表示已发生的情况对现在的影响(我去不了了)，所以用现在完成时。