It is______to everyone that the boy has been badly treated. 

People often think they are energetic and healthy and don’t need exercise. _______ , I have to warn that it is completely wrong.

 With more and more farmers moving to cities, an inadequate labor force is    becoming a major factor affecting the country's grain output.

Having been told ________ where he lived, I had no difficulty in finding Peter’s address.

________ we looked at it, the better we liked the oil painting.