画出重50N的小球所受力的示意图.

    ①The Internet is becoming more and more popular. It brings us a lot of fun and convenience, ②但它也引起一些新的问题。 Children like the Internet. They would rather communicate with others online than talk with their parents.

    On the one hand, in my opinion, the Internet brings people closer. On the other hand, ③如果我们花太多的时间在网络上, we will have less time with our families and friends in the real world.

    ④Parents are always staying with us. So why not talk to them face to face when we have problems. If so, ⑤I'm sure that we can get on well with our parents.

用for或since改写下列句子。