—Whydidn'tyoucometoMike'sbirthdaypartyyesterday?—Well，I...

問題詳情：

—Why didn't you come to Mike's birthday party yesterday?

—Well，I________but I forgot it.

A．should                       B．must

C．should have                  D．must have

【回答】

C

知識點：虛擬語氣與情態動詞

題型：選擇題