—It’seighto'clockalready.Jack

问题详情：

—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

知识点：情态动词

题型：选择题