Question

—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

Answer 1

C               

             
試題分析：考查情態(tài)動(dòng)詞。句意：杰克剛才不在辦公室。他肯定正在指導(dǎo)那些一個(gè)小時(shí)內(nèi)要駕照考試的學(xué)員。 根據(jù)上文提到Jack is not in the office at the moment 他剛才不在，故表肯定推測(cè)，推測(cè)剛才正在做某事must be doing,所以選C項(xiàng)。        
考點(diǎn) : 考查情態(tài)動(dòng)詞