Many students didn’t realize the importance of study _____ they left school.

Peter likes reading a newspaper______ he is having breakfast.

Is this university_______ your elder brother will choose this year?

Jack, there is someone in the office ______ would like to speak with you.

I like the teacher ________ classes are very interesting and creative.

The whole world is fighting against the H1N1, a disease ______ has caused many deaths.

Jim dislikes people ______ talk much but never do anything.

This is the novel ______ is written by Guo Jingming.

I began to work in Shanghai in the year _______ HongKong was returned to China.

Friends are those______ make you smile，always open their hearts to you and encourage you to succeed.