—Jane, have you finished your paper? —No
题型:选择题
问题:
—Jane, have you finished your paper?
—No, I ________ my sister with her drawing all the morning.
A.help
B.helped
C.was helping
D.have been helping
—Jane, have you finished your paper?
—No, I ________ my sister with her drawing all the morning.
A.help
B.helped
C.was helping
D.have been helping