The boy___ streets without pay in the old days.

Talking loudly in a library is impolite. –In fact, we should also take care not to cough or sneeze loudly in public.（找出与画线部分意思相同或相近的选项）

I hear we’ll have a school trip next week.— ______. I want to relax myself.

One of the most important questions they had toconsider was ______ of public health.

Her dream has _____.