二战后美苏两国的最大差别是[ ]

A．外交政策与社会制度　　

B．军事工业与军队人数

C．工业实力与黄金储备　

D．政治力量与军事实力

根据所给首字母或中文提示填空。

1.  We should give our s______to the old on the bus.

2.  The question is so e ______ that he can work it out.

3.  We should have three m______ on time to keep healthy.

4.  How many s______ are there in the cinema?

5.  He learns to sing English songs on the r______