______it's difficult to make her dream come true，she never gives up.

Scientists say it may be a few years ______it is possible to test the new medicine on patients.

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.