What are you worrying about? —It is ________ there is any chance of being infected by AH1N1 virus

Everyone _____ do his best for the modernizations of our country.

This is no-smoking zone. Can’t you see the sign —-Oh, sorry. I ______ it.

I can’t wait _______ my cousin. She is coming to China from England.

Our class adviser doesn’t doubt，in any case.___.we can overcome the difficulties in our study.Healways gives us a confident smile.