问题
选择题
_____ we choose healthy food for our main meals, we probably still need to exercise now and then.
A．Unless
B．As though
C．Until
D．Even if
答案
答案：D
本题考查连词的用法。unless“除非，如果不”；as though“好像，似乎”；until“直到”；even if“即使，纵然”）