—Why didn’t Susan come to school? —I don
题型:选择题
问题:
—Why didn’t Susan come to school?
—I don’t know. She____ ill.
A.could be
B.may have been
C.might
D.must have been
—Why didn’t Susan come to school?
—I don’t know. She____ ill.
A.could be
B.may have been
C.might
D.must have been