While ____ the benefits of membership, it is also necessary for China to follow the rules of the WTO.( )
A.it is enjoyed
B.enjoying
C.to enjoy
D.enjoy
正确答案是B
While ____ the benefits of membership, it is also necessary for China to follow the rules of the WTO.( )
A.it is enjoyed
B.enjoying
C.to enjoy
D.enjoy
正确答案是B