We don't have school ____ Saturdays ____ Sundays. [ ]
A. from; to
B. on; or
C. on; and
答案:B
( )时期个人的人生目标是安享晚年,享受夕阳红。
A.单身期
B.家庭与事业形成期
C.家庭与事业成长期
D.退休期