----Have you finished your homework?-----No, I ________ my younger sister all day yesterday.
#103214
A
was looking after
B
would look after
C
had looked after
D
look after
推荐题目
---The window must have taken you quite a lot of time that day. --- You are right. They ________ for weeks.
#102507
A
haven’t been cleaned
B
hadn’t been cleaned
C
didn’t’ clean
D
haven’t cleaned
Miss. Gao _______ in the library for three years. But now she is a teacher.
#102018
A
worked
B
has worked
C
had worked
D
has been working
The plane___________at 11:05. 
#103570
A
takes off
B
took off
C
will take off
D
taking off