1) there are some/two/many good reasons for.../to do...

2) We have two good reasons for...

3) the reason for...is that+從句

4) Among the most convincing reasons given by people for...,one should be mentioned...

5) One may think of the trend as a result of...

6) the change in... largely results from the fact that...

7) there are several causes for this significant growth in... irst...

8) A number of factors could account for the ....

9) It is no simple task to give the reason for ...

10) the cause of/reason for higher prices was an increase in demand.

11) Because/As/Now that/Since the demand has increased, the prices are higher.

12) An increase in demand causes/results in/leads to/produces higher prices.

13) the demand has increased.

14) therefore,/As a result,/For this reason,/Because of this,/Consequently, the prices are higher.

15) If there is an increase in demand, then prices rise./go up. /boost./are higher.

16) Different people look at...in different ways...