Exercise One Part A Part B Part C Exercise Two Part A Part B Part C Exercise Three Part A Part B Part C Exercise Four Part A Part B Part C Exercise Five Part A Part B Part C Exercise Six Part A Part B Part C Exercise Seven Part A Part B Part C Exercise Eight Part A Part B Part C Exercise Nine Part A Part B Part C Exercise Ten Part A Part B Part C Exercise One Part A Part B Part C Exercise Two Part A Part B Part C Exercise Three Part A Part B Part C Exercise Four Part A Part B Part C Key to the Exercises · · · · · · (收起)