1、 Climbing tall trees is dangerous .

1、Climbing tall trees is dangerous .
> it's dangerous to climb tall trees.
2、 The boy is too young to go to school .
>the boy is not old enough to go to school.
3、 Judy’s schoolbag isn’t the same as Paul’s .
>Judy’s schoolbag is different form Paul's
4、 This desk is 2 meters long . That desk is 2 desk meters long , too .
>both this and that desk are 2 meters long
5、 Cutting down too many trees will cause floods in the future .
> floods will be causedin the future for cutting down too many trees.
6、 The woman was a bank manager when she was 35.
>the woman was a bank manage at 35 years old
7、 Believe it or not , I am as old as Linda.
>believe it or not, i am the same age as linda
8、 My sister is never late for school .
>my sister is always on time for school
9、 Tony prefers to eat green vegetables rather than meat .
>tony prefers to eating green vegetables to meat
10、 Linda doesn’t drink as much Coke as Jack.
>linda drinks less coke than jack
11、 I don’t think cartoons are the same as operas .
>i think cartoons are different from operas
12、 The traffic accident was caused by the driver’s carelessness.
>the driver's carelessness cause the traffic accident
13、 What type of film do you like to see this time ?
>which film do you like to see this time
14、 You will pass the exam if you study hard.
>you will pass the exam as long as you study hard
15、 Please open the window so that we can breathe some fresh air .
>please open the window for us to breathe some fresh air
16、 Anna was so careless that she didn’t find the mistakes in her test paper .
>anna ws not careful enough to find the mistakes in her test paper
17、 The city government is working hard to improve the environment .
>the city government is working on improving the environment
18、 Wendy keeps in touch with her friends by writing e-mails .
>wendy writes emails to keep in touch with her friends
19、 It was fortunate for me that I met the star in the street .
>it was fortunate to meet the star in the street for me
20、 To learn English well is difficult .
>it is difficult to learn english well