417. Proper measures must be taken to limit the number of foreign tourists and great efforts should be made to protect local environment and history from the harmful effects of international tourism.
本句是被动语态使用的典型范例，两个并列句由and连接，不仅避免了人称做主语，还保持了句子前后的一致性。take measures to do sth.意为“采取措施做某事”；make efforts to do sth.意为“努力做某事”；protect sth. from sth.意思是“保护某事物不受另一事物的影响”。
The property taxes on the residents in the community will be raised.
Initially, housing and farmland were created and established, and industry eventually followed.
Parents should be encouraged to send their children to nursery schools, which will bring about profound impacts on children and families, and even the society as a whole.