Teenagers should have more (机会) to make their own decisions.
Everyone should (行动)now to separate rubbish into different groups.
It is important for us (学会如何表达)our sincere thanks to others.
Suddenly,Lucy saw a policeman near the bus station."I may ask him for help."She _ (自言自语).
Brazil (因……而著称)the Amazon rainforest and soccer.Many people travel there every year.
Yesterday afternoon my brother (花了两个小时安装)a new light in our bedroom.