Why do you like dogs—________ they are very friendly.

He ________ in American for five years, andnow he works in Shanghai.

I don’t think a warm winter always has a negative influence on our life, _____?

Did you visit the famous cultural relics last month?—No,we _________ it,but we spent too much time shopping.

You must always ______ the traffic whenever you are in a crowded city.[ ]