While watching television, __________.
#90451
A
the doorbell rang
B
the doorbell rings
C
we heard the doorbell ring
D
we heard the doorbell rings
推荐题目
My boss insisted that I _______ the work before ten o’clock tonight.
#87564
A
can finish
B
must finish
C
must have finished
D
finish
— It _______ be Jack who is in the office.— No, it _______ be him. I saw him off at the airport half an hour ago.
#89500
A
can’t ; can’t
B
must; can’t
C
must; mustn’t
D
may; mustn’t
“I called you yesterday. A woman answered, but I didn’t recognize her voice.” “Oh, it _____ my aunt Jean.”
#89565
A
must be
B
must have been
C
might be
D
can have been
If you ______ succeed, you will have to work hard.
#87734
A
are about to
B
are going to
C
will
D
are to
I tried to call on you last week but your dog simply ____ not let me come through the gate.
#89192
A
could
B
would
C
might
D
should