The old professor asked us ______ we read books in our spare time.

______the Internet is of great help, I don’t think it’s a food idea to spend too much time on it. 

Was it because of the heavy snowstorm in Europe        the flight had to be put off?

3. It is exactly its great success in rural reforms _____ prompted the country to make a bigger leap forward in the reform and opening-up drive.

A total of 548 students fell ill ______ consuming milk and biscuits in schools in Northwest China's Qinghai province on Wednesday, local authorities said.