--Tree Planting Day is coming. Do you plant trees in spring?---Yes, many trees ________ in our city every year.

— Food problem is becoming a big one in China! —I think the food ________ before going to shops or supermarkets. 

I live in a city  ____  shijiazhuang.

---It’s difficult for the villagers to cross the river. ---I think a bridge______ over the river.

The old over 90    __  not only by their family but also by the government in many places.