四、按要求完成句子。
21. Get up early, or you will be late for the meeting. (改为同义句)
_ youget up early, you will be late for the meeting.
22. Finish your homework and you can watch TV. (改为含有条件状语从句的复合句)
_ you finish your homework, you TV.
23. I will be free this weekend. I will go to visit my aunt. (用 if 改写句子)
free this weekend, I to visit my aunt.
24. 如果明天下雨，他将待在家里。(汉译英)
tomorrow, he at home.
25. With your help, I can finish the work on time. (改为同义句)
, I can finish the work on time.

四、21.If;don’t 22.If;can;watch 23.If;I’m;will;go 24.If;it;rains;will;stay 25.If;you;help;me

五、语法填空。
We live with them and grow up with them. They work hard, take us on 26.(excite) holidays, give us food, clothes and take good care of us. However, we often shout 27.them, make the rooms noisy and dirty and expect that they always understand and love us! 28.are those wonderful people? Of course, our parents!
It's certainly not easy 29.(be) a teenager. There are so many changes and problems as we grow up. Our 30.(body) and minds are changing fast and all the changes and problems can be scary. In fact, most of 31.answers to the problems can be found from our parents. If we get to know more about our parents, we 32.(understand) them better. We will find that 33.sometimes they are angry with us, they still love and care about us.
Take the time to stay with your parents and enjoy spending time with 34.(they): Go fishing with Dad, help Mum with housework and really talk to them. Often you will be surprised at what they tell you. This will lead to a much 35.(good) understanding and deeper (更深的) love. So let's start with something easy and see what wonderful things can follow.

五、26.exciting 27.at 28.Who 29.to be 30.bodies 31.the 32.will understand 33.although 34.them 35.better