--Mr. Li, I found a watch on the playground. --You should try to find out _________A. whose is the watch B. who is the owner of the watchC. whom does the watch belong to
We all feel ______after hearing of the _______news.
We should set up some shelters _____the homeless people.
It is_______ interesting book ,we all like it.
Our teacher told us ______carefully in class.
Some ______are ______their time to help the old people.