Having taken our seats, ______.
#91290
A
the professor began the lecture
B
the lecture began in no time
C
we were attracted by the lecture immediately
D
the bell announced the beginning of the lecture
推荐题目
The professor explained this theory so clearly that this phenomenon was easy enough ________.
#95942
A
for us to work out
B
working out
C
for working out
D
to working out
 His first book   next month is based on a true story.                
#89418
A
published
B
to publish
C
to be published
D
being published
The machine is easy to _______if you follow the instructions.
#91708
A
be operated
B
operate
C
be operated on
D
operate on