we choose healthy food for our main meals we probably still need to exercise now and the

问题补充：

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：

A. Unless

B. As though

C. Until

(答案→)D. Even if

解析：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”）