Flying kites, ______ some researchers point out, can not only bring about joy to us, but also promote our physical and mental health.
We tried to find a table for seven,hut they were all .
a certain doubt among the people as to the practical value of the project.
China has got a good ______for fighting against the flu with its careful and smooth organization.
Many children,______ parents are away working in big cities,are taken good care of in the village.