问题详情：
41. He doesn’t depend on his parents for money and lives a life of i_______.
42. In some countries, people eat too much fat and sugar. They should eat a b_____ diet to keep healthy.
43. We are not p___________to swim in the river. It’s too dangerous.
44. He was very v___________when he got drunk.
45. The patient is ___________ (稍微) better today.
46. The professor has brought in a good ___________ (系统) of teaching languages from abroad..
47. Now we still don’t know whether life e___________ on Mars.
48. China is in Asia, one of the seven___________（洲） on the earth.
49. His illness ___________ (做出解释) for his absence.
50. People say the city is Canada ‘s most beautiful city,___________（围绕）by mountains and the Pacific Ocean.
【回答】
41. independence
42. balanced
43. permitted
44. violent
45. slightly
46. system 47. exists
48. continents
49. accounts或accounted
50. surrounded
知识点：其他
题型：单词拼写
