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
推荐题目
While watching television,          .
#88583
A
the doorbell rang
B
the doorbell rings
C
we heard the doorbell ring
D
we heard the doorbell rings
Film has a much shorter history, especially when __________ such art forms as music and painting.
#94149
A
having compared to
B
comparing with
C
compare with
D
compared with