Mr Zhang left for America in 1998, and h
题型:选择题
问题:
Mr Zhang left for America in 1998, and he didn't return home 2002. [ ]
A. unless
B. when
C. until
D. since
Mr Zhang left for America in 1998, and he didn't return home 2002. [ ]
A. unless
B. when
C. until
D. since