Professor Smith, along with his assistants, ________ on the project day and night to meet the deadline.
#96474
A
work
B
working
C
are working
D
is working
推荐题目
Physics is difficult ____.
#98661
A
to be learned
B
to learn
C
to be learning
D
to be learn
The poor old beggar looked forward to _____ by the other beggars.
#97871
A
not playing a trick on
B
not being played a trick on
C
playing not a trick
D
being not played a trick
 Paul does nothing but _____ all day long.
#97507
A
play
B
to play
C
playing
D
played