It’s suggested that vehicle taxes should be set ____ on how dirty the car’s exhaust is, with no tax ___________ on the most environmentally friendly one.

Do you know the story of Niulang and Zhinu—Of course. Their love story was_______ as an example for hundreds of years in China.

It is necessary for everyone to a good habit of reading.

Do you think students should be allowed to do their homework with music on — . If so, they can’t concentrate on the study.

Come on,please give me some ideas about the project.— Sorry. With so much work____my mind,I almostbreak down. [ ]