Many people have been ill from a strange disease these days,       we’ve never heard of before.

 He is the most hard-working students in his class. That means he is more hard-working than_______ in his class.

Since many young people have become rich on Taobao.com, I wonder what        ________ is like to run a successful on-line business.

My watch doesn’t work. There’s ______ wrong with it.

          worries me the way he keeps changing his mind.