Nowadays the doctors are trying their best to reduce the people’s fear they would be affected by the present disease called “Bird Flu （禽流感）”.

Could I have a word with you, mum? —-Oh, dear, if you ______.

Paul Walker, the world-famous actor had a serious car accident and was burnt to death.—Both his family and fans ______ be very sad.

Is the boy your brother — It __________ be. I don’t have brothers or sisters at all.

This year our school is ____ than it was last year.