—Has Billy finished his homework today?—I have no idea.He        it this morning.
#104538
A
would do
B
was doing
C
has done
D
had done
推荐题目
--- So what is the procedure? --- All the applicants ______ before a final decision is made by the authority. 
#100351
A
interviewed
B
are interviewing
C
are interviewed
D
are being interviewed
How can I ever concentrate if you ________ continually ________ me with silly questions? 
#104794
A
have…interrupted
B
had interrupted
C
are…interrupting
D
were…interrupting
.--- I hear you__________at Smith’s. --- Yes, I__________there for about three months.
#103871
A
work; had been working
B
worked; was working
C
are working; have been working
D
worked; have worked