He ____ writing the paper now. He hadn’t written a single word when I left him ten minutes ago.
#89345
A
shouldn’t be
B
can’t have finished
C
can’t be
D
mustn’t have finished
推荐题目
 What a pity! If I had known Tom earlier, I ________ him to the party.
#87414
A
had invited
B
would invite
C
invited
D
would have invited
The little girl        ,but her family was too poor at that time.
#89335
A
could go to school
B
could have gone to school
C
must have gone to school 
D
can have gone to school
If you had listened to the doctor, you  _________ all right now. 
#86988
A
are
B
were
C
would have been
D
would be