Thomas Edison， one of the greatest （invent） in the world， created over 1，000 things．
Shenzhen Special Economic Zone （经济特区） celebrated its （ forty） birthday on Oct.14，2020.
一Government has taken actions to stop water and air （ pollute）.
一Yes.Clear waters and green hills are as good as mountains of gold and silver.
一My father will take me to the West Lake in Hangzhou this Saturday.
一Really？I hope you'll enjoy （ you） weekend.
Beijing opera （ introduce） to more people around the world during the 2020 Mei Lanfang Art Festival.
Look!The children （ circle） a robot，talking about science development.