-How did it        that the secretary knew where we were?-Maybe he had been following us.
#64797
A
come about
B
come across
C
come off
D
come round
推荐题目
Although I often send e-mails to Tom, I have never seen him _____________. 
#71576
A
face to face
B
in time
C
at the moment
D
hand in hand
The room wants ___.
#81210
A
to clean
B
cleaning
C
cleaned
D
being cleaned