用方框中所给单词的适当形式填空，使短文通顺、正确、连贯（每个单词限用一次）
| so, true, kind, say, much, invite, you, instead polite, activity |
When someone asks you to do something you do not feel like doing, what should you do? It's a good idea to say “no” at this time. It's better to spend more time on some useful ____ .However, you may worry others will think you impolite or____ . What should you do? Here are some tips that may help you.
It is OK to make up white lies. That doesn't mean you are dishonest. ____ , it may make both you and the other person pleased and comfortable.
When ____ to a party or some other events that you do not want to take part in, you can say, “No, but thanks for the invitation. That's very kind of you.” In this way you can not only refuse____ but make the person who invited you feel comfortable.
When you don't want to lie, just tell the ____ . You may say like this, “I want to spend more time on myself,____ I've decided to say‘no’to these activities.” In this way, people will see that you respect yourself, and as a result they'll also pay you____ respect.
My last suggestion is to just do it. You may feel uncomfortable at first, but this is not the reason for ____ “no”. Never make anything more complicated （复杂的）than it is.
Feel proud of ____ for being strong enough to say “no”.
。假定石块间的摩擦力可以忽略不计，则第1、2块石块间的作用力和第1、3块石块间的作用力的大小之比为 