1.Most air pollution is caused by the burning of ____ like coal, gas and oil.           

A. fuels                               B. articles                               C. goods                               D. products

2.I forgot the website _______ I intended to add to my favorite. It can help me learn how to write English composition.           

A. which                               B. where                               C. when                               D. on which 

3.________when we passed by its nest.  

A. Up into the blue sky did the bird fly
B. Up into the blue sky the bird flew
C. Up into the blue sky flew the bird
D. Flew up into the blue sky the bird