题目内容：

If you are invited to a party by the Austrians and the suggested dress is "informal(非正式的)" (usually marked in the lower left-hand coner of the invitation) , it may mean dark suit and a white shirt for men and cocktail dress( 短短服) for women. Or again, may mean something considerably less formal. "Formal" means a black tie and evening dress for men and a floor-length dress for women. If a man is in doubt(拿不准) about what to wear, he may come slightly overdressed and then take his coat and tie off when he sees that others are wearing sports shirts. National dress is always acceptable.

1.If a lady receives an invitation marked with "formal", she should wear

A．a long dress        B．a cocktail dress     C．a short dress       D．a dark suit

2.Suppose you are a man invited to an informal party by an Austrian, you'd better          .

A．wear dark clothes and dark suit

B．dress yourself in a dark suit and a white shirt

C．wear a coat and so on

D．wear sports shirts

3.The general idea of this passage is                .

A．men and women should be dressed differently

B．national dress is always useful

C．what to wear if a person is invited to an Austrian party

D．men and women should dress themselves beautifully

4.The meaning of "overdressed" is                .

A．dressing oneself a little too formally         B．dressing oneself a floor-length dress

C．wearing one's tie                        D．dressing a sports shirt