Ⅰ.单句语法填空
1．It is generally accepted that smoking is________(harm) to our health.
答案： harmful
2．The________expression on his face suggested that he was not able to work out the________problem.(puzzle)
答案： puzzled；puzzling
3．There are lots of __________ (religious) in the world and everyone has the right to believe in them.
答案： religions
4．There are a great number of different __________ (theory) about learning styles throughout the world.
答案： theories
