Lady Gaga has put off her concerts becau
题型:选择题
问题:
Lady Gaga has put off her concerts because of the difficulties ______ by the ongoing strikes.
A.causing
B.to be caused
C.caused
D.to cause
Lady Gaga has put off her concerts because of the difficulties ______ by the ongoing strikes.
A.causing
B.to be caused
C.caused
D.to cause