我们需要采取一些措施来减少污染.
(take steps)
Every autumn, the (落下的) leaves make our school more beautiful.
To be safe,students should (避免) going out alone at night.
At the age of (四十), the writer finished his fifth novel.
You should (道歉) to her for your mistake.
Liu Yang is the first Chinese woman (宇航员) to enter the space.