Just because they make more money than I do,  _____ they seem to look down on me.?

_____ is hard is to do good all one's life and never do anything bad.?

All plants need air_____ they need water.

_____ he  wasn’t ready in time, we went without him.

I had hardly sat down_____ the telephone rang

I am sorry_____ I have caused so much trouble.

_____it was late , she went on working.

They stopped at Tianjing_____they might visit the TV tower.

_____everybody is here, Let’s begin our meeting.

He must have passed this way, _____here are his footprints.