Lady Gaga has put off her concerts because of the difficulties       by the ongoing strikes.
#89261
A
caused
B
causing
C
to be caused
D
having caused
推荐题目
Have you checked all the CDs _____ to the mountainous area next week?
#92875
A
sent
B
to be sent
C
sending
D
being sent
The young lady prefers dressing up for a party to ____ by others.
#98116
A
be noticed
B
being noticed
C
having been noticed
D
have been noticed