—It’seighto'clockalready.Jack

問題詳情：

—It’s eight o' clock already. Jack ____ be here by now.

  —Oh, he told me that he was going to see his dentist and wouldn't be back until ten..

   A                           B. can                          C. should                      D. need

【回答】

C

知識點：情態動詞

題型：選擇題