The environment is becoming worse and worse. I think we should do something to ____ people ____ cutting the trees in order to protect the earth.

 The workers in the Huashan Mountains have to       rubbish to keep the mountains clean.

— Do you have a baseball?— __________. But Lily has one.

 Mom is cooking dinner. It ______ so nice.

There _____ a pen, two pencils on the desk.