I’ll go to the library as soon as I finish what I       .
#99930
A
was doing
B
am doing
C
have done
D
had been doing
推荐题目
This is the second time that you ______ the Summer Palace.
#100197
A
visited
B
have visited
C
had visited
D
are visiting
All the essays _____________, the teacher sent the students home.
#102948
A
having written and collected
B
having been written and collected
C
being written and collected
D
to be written and collected