—Alice，youaresupposed

問題詳情：

—Alice，you are supposed________ part in the party in time.

—Sorry，but I had an unexpected visitor.

A．to take                          B．to have taken

C．to be taking                     D．taking

【回答】

B　[由下句可知，上句意：你理應及時參加晚會(但事實上沒參加)；was/were supposed to do表示“本應該發生但實際未發生的事”，相當於be supposed to have done。]

知識點：非謂語動詞

題型：選擇題