---- Where is mother? ---- She is in the
题型:选择题
问题:
---- Where is mother?
---- She is in the kitchen. She ______ the housework all morning.
A.was doing
B.has done
C.has been doing
D.is doing
---- Where is mother?
---- She is in the kitchen. She ______ the housework all morning.
A.was doing
B.has done
C.has been doing
D.is doing