—______ your sister ______ in Greener China for a long time?—Yes.She joined it five years ago.
Miss Lin____________ a lot of work for the poor area since 2010.
Our teacher often asks us____________ questions in groups.
Mr. Green, a famous writer, ____________ our school next week.
---____________do you go to the cinema? ---Once a month.
There____________ many trees in front of my house now.