—When is Jack going to finish writing th
题型:选择题
问题:
—When is Jack going to finish writing that program?
—I don't know ______ day in and day out.[ ]
A. He has been working
B. He has worked
C. He had been working
D. He was working
—When is Jack going to finish writing that program?
—I don't know ______ day in and day out.[ ]
A. He has been working
B. He has worked
C. He had been working
D. He was working