问题
选择题
—Ring me up _______ you come to my house, will you?
—Sure, I will.[ ]
A. though
B. while
C. before
D. until
答案
答案:C
—Ring me up _______ you come to my house, will you?
—Sure, I will.[ ]
A. though
B. while
C. before
D. until
答案:C