I my homework while my mother was reading a book last night.
#40089
A
did
B
do
C
was doing
D
were doing
推荐题目
—Have you ever been to Shanghai, Mary?—Yes. I ___________ there three times.
#38196
A
have gone
B
have been
C
went
D
was
—Did you meet the professor at the airport?—No，he ____ by the time I ____ there．
#42354
A
had left；got
B
has left；reached
C
was leaving；got
D
left；had got