问题
选择题
______ Jason is willing to help, he doesn't have much time available. [ ]
A. As
B. Since
C. While
D. Unless
答案
答案：C
搜题请搜索小程序“爱下问搜题”
______ Jason is willing to help, he doesn't have much time available. [ ]
A. As
B. Since
C. While
D. Unless
答案：C