—Who did English homework better, Leo or Nick?                  

—Leo is more careful. I think Leo did _____Nick.                 [ ]

A. as good as              

B. as well as                

C. better than              

D. worse than

（4分）

配平下列化学方程式（化学计量数为1也要填入___内）

⑴  _    _C3H8+     _O2       _H2O +      _CO2

⑵      _FeS2 +         O2             Fe 2O3+            _SO2