Mr.Brown,ourgeographyteacher,

問題詳情：

 Mr. Brown, our geography teacher, ________________, for her bag with maps and a globe are already on the teacher’s desk. 

A. must arrive   B. must have arrived   C. can have arrived    D. has arrived 

【回答】

B

知識點：虛擬語氣與情態動詞

題型：選擇題