I’m not sure ______ he will win the game or not.

.If you ________ be quiet, I will tell you what happened.

She is very tired walking all day. Don’t _______ her waiting outside in the rain any longer.

Scientists don’t think that a warm winter always has a negative influence on our life,____?

Nowadays many housewives prefer to go to supermarketsfor their shopping, because they provide a large ofgoods.