The professor has written another book ____ of great importance to computer science. 
#91814
A
which I think it is
B
and I think is
C
which I think is
D
when I think is
推荐题目
“I haven't heard from Henry for a long time.”“What do you suppose_____ to him?”
#91836
A
was happening
B
to happen
C
has happened
D
had happened
Is that a book in farming?  ________,I want to borrow it.
#91786
A
So it is
B
If so
C
So is it
D
So if
—What’s the matter with you, Tom?—______ the ladder, one of arms has been broken.
#91809
A
Climbing
B
While climbing
C
To climb
D
While I was climbing