题干
—I'm tired out these days. --Well, you'd better keep a _____ between work and play.
A：promise
B：diary
C：balance
D：secret
答案(点此获取答案解析）
C
—I'm tired out these days. --Well, you'd better keep a _____ between work and play.
A：promise
B：diary
C：balance
D：secret
