分析 （高分句型一）So I'm writing to let you know that it's not convenient for me to go back to receive the laptop at home．首先that引导一个宾语从句；在宾语从句中使用固定句型，即it's convenient for sb to do…对某人来说做某事是方便的．（高分句型二）Don't hesitate to contact the seller if you find any damage．该句使用Don't do 的祈使句；还有if引导的条件状语从句．高级词汇：estimate估计；do me the favor帮忙；make sure 确保；hesitate to 犹豫做；
解答 Dear Peter， I think I need your help．Last Friday I placed an order for a laptop on line，and it is estimated to arrive to your address this Sunday．But you know I'm out with my parents，and we are going for a trip to London this weekend．（高分句型一）So I'm writing to let you know that it's not convenient for me to go back to receive the laptop at home．Can you do me the favor，please？ It's a Lenovo laptop made in China．Please give it a careful checkup and make sure the package is well preserved and the machine operates well．（高分句型二）Don't hesitate to contact the seller if you find any damage．Thank you very much． Best wishes! Yours， Li Hua
点评 在完成半开放作文时，首先要选择自己熟悉的短语或者句型，在能力范围之内，选择句式时要赋予变化，因为这样才可以更好的驾驭．同时也要选择合适的连接词，把各个要点组织成一个完整的整体