you take a bus to school— Yes. But now I usually go to school on foot.

Mary had to go to a meeting,so she left her children _________ at home. [ ]

Peter was fired again. He really didn’t know _____ went wrong.

Seeing the chemical ________ to the sunlight, Mr. Leewarned the workers to be careful when dealing with it.

It will be three days __________he ________back fromhis home town..