11. Too much social activities, on the other hand, will cause a lot of problems.
12. Too much activities, on the other hand, will cause a lot of problem .
13. Certainly, often changing job can cause a lot of problem .
14. But the policy caused a lot of bad effects .
15. Automatically allocating jobs has caused a lot of problems.
16. China is carrying out the open policy, which cause a lot of joint-venture companies appear.
17. These problems really cause a lot of troubles and misfortunes to our society.
18. So I expect to peace all over the world because I know fighting to all over the world causes a lot of suffering-people are homeless, no food to eat, unwearing and no water to drink, even full of illness ..
19. So doctors have to take up this responsibility, which often causes a lot of controversies and disputes.
20. We can't give our freedom to the criminals who receive it and cause lots of trouble to us.