Schools in the south tend to be better e
题型:选择题
问题:
Schools in the south tend to be better equipped, _____ those in the north are relatively poor.[ ]
A. while
B. since
C. when
D. as
Schools in the south tend to be better equipped, _____ those in the north are relatively poor.[ ]
A. while
B. since
C. when
D. as