—Sorry, sir. I can’t answer this question. ---Well, you are supposed______ this part of history.
#86779
A
reading
B
to be reading
C
to have read
D
having read
推荐题目
When a pencil is partly in a glass of water, it looks as if ____. 
#89905
A
breaks
B
has broken
C
were broken
D
had been broken
The little girl ___ out in the dark at night.
#88950
A
dares not go
B
dare not go
C
doesn't dare going
D
dares not to go