Make the sentences academically respectable and defensible

1. In some cases, attractive people tend to have more favorable personal attributes than unattractive people.
2. Seemingly, the economic sanctions assumed to be ineffective.
3. According to simulation studies, in some circumstances alcohol influences people to become violent.
4. The quantities displayed assumed that passive smoking may cause cancer.
5. Some of the evidence indicate that recycling might be the best solution to the waste disposal problem.
6. There is little possibility that physical exercise may prevents depression.
7. It seems that deep tunnels could be safer and less vulnerable to earthquake shaking than shallow tunnels.
8. The latest series of sutdies question that the private schools could provide a better education than public schools.