问题
选择题
— Where is Bob? I cannot find him anywhere.
— He ________ have been off long. I heard him make a call just now. [ ]
A. shouldn't
B. can't
C. mustn't
D. needn't
答案
答案：B
搜题请搜索小程序“爱下问搜题”
— Where is Bob? I cannot find him anywhere.
— He ________ have been off long. I heard him make a call just now. [ ]
A. shouldn't
B. can't
C. mustn't
D. needn't
答案：B