11. They are quite different from each other in their opinions.
12. Some people hold the opinion that…
13. They think quite differently on this issue.
14. They differ greatly in their attitudes towards the affair.
15. It is important (necessary， urgent， advisable， desirable， inevitable) for sb. to do…
It is important (necessary， urgent， advisable， desirable， inevitable) that…
16. have trouble/difficulty (in) doing…
have trouble with…
17. The reason for / cause of higher prices is an increase in demand.
18. As/Since/In that/Now that the demand has increased， the prices are higher.
19. An increase in demand causes/results in/leads to/produces higher prices.
20. The demand has increased， and as such， the prices are higher.
21. As a result of all these factors， the government is becoming increasingly dependent on scientists for planning appropriate programs and putting them into effect.
