Writing: For this part, you are supposed to write an e-mail in about 100 - 120 words based on the following situation. Remember to write it clearly. 你(Li Yuan)下周一因為要去參加演講比賽,不能上外教(Prof.Smith)的寫作課。請給他寫一封e-mail,內容包括:·請假并表示歉意;·解釋不能上課的原因,如比賽的重要性;·承諾會自學所缺內容并按時交作業;·祝他偷快。