He sat at the desk, __________ a novel.
It is ________ world of wonders, ________ world where we can find anything changed.
____ he has made up his mind to do something, nothing will stop him.
---- I drove to Zhuhai for the air show last week.---- Is that the reason _______ you had a few days off?
Only by working hard your dream of becoming a doctor.
Although the working mother is very busy,she still a lot of time to children.