题目内容：

阅读下面短文,根据短文内容, 在每小题句子空白处填入适当词语,使其意思与短文内容一致(每空词数不限)。

People often shake hands in the United States. American men shake hands with other men. American women often shake hands with men and sometimes they shake hands with other women. Adults shake hands with children. And some people even teach their dogs to shake hands! What's the correct way to shake hands? How long should you shake hands? How hard is just hard enough?

Here are four rules to remember.

Use your right hand.

Use good eye contact(交流). Look at the person in the eye while you are shaking hands。

Don't shake hands too long. Shake hands for no more than three seconds. Then let go and take your hand back.

Don't shake hands too strongly or too weakly. When a handshake is weak, Americans think the person may not be a hard worker，or a good leader. When a handshake is too strong, Americans think the person is not polite.

When do people in the United States shake hands? They shake hands when they meet for the first time. They shake hands to say congratulations. They shake hands when they meet after not seeing each other for a while. And they often shake hands when they say goodbye. In business，shaking hands shows agreement and honesty.

Handshakes are good everywhere. It is not polite to refuse a person's hand. So make sure to shake lots of hands.

1.We can learn from the first paragraph that shaking hands is very_________ in the United States.

2.The passage gives four pieces of advice on how to________________.

3.In the eyes of Americans,if a person shakes hands too strongly,he or she________________.

4.Americans shake hands in_____________( how many )situations according to the passage.

5.At the end of the passage,the writer suggests that we should_________________.