Computer games are very popular. It is natural for people to want to _21___ , so playing against a computer or against a friend on the computer can be __22__to stop. “ Just one more game, ” often turns into another game, then another.
Computer games do have their _23__. They are excellent for training hand or eye coordination(协调).Surgeons (外科医生)_24____played computer games as children are often skilled. Computer games can __25__ be great for teaching students. The students are open to learning while playing. They can study for longer than a teacher would be able to teach.
But like anything __26__ in life, things should be balanced.(平衡).Too much time on the computer can _27__ your eyes. Regular breaks are needed. If students cannot _28__ playing computer games, they won’t do as well in other areas in their life—not just schoolwork, but in developing important social skill such as how to talk with people and how to work with others. And if they are no longer taking regular exercise, __29___ health will become worse.
Computer games have their place, __30___people must also remember it is important to have a balanced lifestyle.

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1.He often does his homework every evening. （一般疑问句）

 ____ he often ___ his homework every evening?

2. There are six boats on the river. （对画线部分提问）

 ____ ___ boats are there on the river?

3. I want to go shopping this Sunday. （同义句）

 I want to ____ _____ ____ this Sunday.

4.. Tom doesn’t know much Chinese. （同义句）

 Tom knows ____ ____ ____ Chinese.

5.The students are all here. （同义句）

_____ ____ the students are here.