养老金的支付形式有( )。
A．一次性支付
B．定期支付
C．一次性与定期支付相结合
D．年支付
E．月支付
参考答案：A,B,C
社会生产及其再生产过程就商品经济形式来说，要经历生产、交换、流通和消费四个环节。 ( )
My father warned me _____ going to the West Coast because it was crowded with tourists. [ ]
A. by
B. on
C. for
D. against
