题目

题型：不详难度：来源：

—Jack is not in the office at the moment
—Oh, he ______ those who are going to take the driving test in an hour.

A．can have instructed	B．must have instructed
C．must be instructing	D．will be instructing

答案

C               

解析

             
试题分析：考查情态动词。句意：杰克刚才不在办公室。他肯定正在指导那些一个小时内要驾照考试的学员。 根据上文提到Jack is not in the office at the moment 他刚才不在，故表肯定推测，推测刚才正在做某事must be doing,所以选C项。        
考点 : 考查情态动词