19. help sb. (to) do/help sb.with
她经常在妈妈不在家时帮妈妈照看小妹妹。
She always helps her mother look after her little sister while her mother is away.
我哥哥过去常常帮妈妈做家务。
My brother used to help Mum with the housework
我经常帮同学们打扫卫生。
I often helped my classmates do the cleaning.
20. I don’t think that
我们把她送到海滩去吧。我想她不认识路。
Let’s send her to the beach. I don’t think she knows the way.
我觉得在网上告诉一个陌生人家庭的事情不安全。
I don’t think it is safe for us to tell a stranger of our family online.
我向他不会讲俄语，否则它不会用德语在这个会议上发言。
I think he can’t speak Russian, or he won’t speak German at the meeting.
21. I would like to /Would you like to…?
如果可能的话，你给我买条新的宠物狗好吗？我保证这次一定好好照顾它。
Would you like to buy me a new pet dog if possible? I promise to take good care of it this time.
您能帮一下忙吗？
Would you like to do me a favor?
.我想和朋友们一起过春节。
I would like to be with my friends for the Spring Festival.
22. is one of the + 最高级 + n(pl.)…
我们都为姚明感到骄傲，因为他是世界上最好的篮球运动员之一。
We are all proud of Yao Ming because he is one of the best basketball players in the world.
周杰伦是中国最流行的明星之一。
Jay Chou is one of the most popular stars in China.
肯德鸡是全世界最火爆的快餐店之一
KFC is one of the hottest fast food restaurants in the world.
23. It is +adj. for sb. to do sth.
对孩子们来说，在动物园里观看各种各样的动物是很有趣的，对吗？
It’s very interesting for children to watch all kinds of animals in the zoo, isn’t it?
对他来说三天看完这么厚的书是很难的。
It’s difficult for him to finish reading such a thick book within three days.
在课上作笔记很有帮助。
It is helpful for us to take notes in class.
24. It is a good idea to do sth.
如果你不喜欢匆匆忙忙的旅行，坐火车旅行真是个不错的主意。
It’s a good idea to travel by train if you hate the rushed trip.
圣诞前夜在家装饰一棵圣诞树是个不错的主意。
It’s a good idea to decorate a Christmas tree at home on Christmas Eve.
紧张的时候做一下深呼吸是一个不错的主意。
It’s a good idea to take a deep breath when you are nervous.