—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

易发生DIC的白血病是（）

A.ALL-12

B.AML-M1

C.AML-M5

D.AML-M3

E.CML-BC