北美考試院 托福寫作組 葉建萍
本期考題考察的話題屬于在托福綜合寫作考試中考察占比較少一些的生態類話題，主要考察的是植物在某方面的功能，形成對比的觀點。 在TPO中涉及到相關植物類話題的并不多，比如TPO 21, TPO 18, 但在近幾年考試，植物類的題目并不少。在2017年植物類的考題出現了5次，分別是：（20170325CN）， （20170708CN），（20170715CN下午場（20170909CN），（20171112CN）。而在2018年出現了7次，分別是：（20180415CN），（20180512CN），（20180714CN），（20180825CN）（20180902CN），（20181028CN），（20181215CN）。希望從這些綜合材料能給考生關于這類話題提供可借鑒的解題思路。
Keywords: knees, oxygen, methane, lodging resistance
TPO21 Planting genetically modified trees
總觀點：genetically modified trees帶來很多好處。
總論點：genetically modified trees會造成問題和經濟損失
1 不能確保genetically modified trees成活，因為相同的gene，遇到環境改變，更容易wipe out；
3 會對普通樹造成傷害，genetically modified trees有侵略性，跟普通樹爭奪資源，比如sunlight, soil, nutrients, and water, eventually crowding out the natural trees。
Independent Writing Task
In areas where there are many restaurants, some people prefer to eat at restaurants frequently. Other people prefer to cook at home and rarely go to restaurants.
Which do you prefer？
在分析題目時需要注意的是題目其中一個關鍵詞提到In areas where there are many restaurants, 在這一條件的限制下，考生不要在寫作中提到附近沒有餐館，所以不方便，這樣容易跑題。請參考如下范文：
Every person has different life style and preference, especially when it comes to food. Some people regard eating meal at restaurants as a luxury enjoyment, in terms of financial situation. Therefore, they tend to eat at home to save the money or stay healthy. I, personally speaking, prefer eating my meals at restaurants. My reasons are given below.
First, food offered in restaurants is always tastier than food cooked at home. Since carefully prepared by professional chefs, it is more delicious and mouthwatering. Who can boldly claim that he or she cooks better dishes than those chefs? Absolutely not. It is the flavor and taste that attract many customers, thus making a profit to the restaurant owners. In addition, a large variety of cuisines from different countries and regions are served at local restaurants. These cuisines offer me a chance to gain a completely new dining experience, by which I have learned much about exotic culture and custom. For example, when I firstly ate pizza at pizza hut, I didn't know how to hold the fork and knife. After listening to the detailed explanation by the kind waitress, I came to know the answers to my questions. At the same time, I was fascinated by this foreign food made by adding other ingredients to bread to make it more flavorful. This experience, therefore, became an impetus for my longing for eating out more often.
Another reason is that eating at restaurants can be very time-saving, given that buying ingredients, such as meat, vegetables or fruit, in the local supermarket or groceries will take at least one or two hours, let alone the travel time. Plus, if I cook by myself, I will use two hours to prepare food and wash dishes after having my not-so-tasty lunch, another two to have super. In this case, four hours are wasted every day. On the contrary, If I choose to have my meal in the restaurant, this will save a large amount of time. To be more specific, I can have four more hours each day to equip myself with new knowledge. That is to say, I can spend these four hours on preparing the final exams or do some related quizzes. Take my classmate as an example to further explain this. When my classmate, Mike, is preparing for an important test. He always cooks dinner himself and continues to do so during this period. So, he has at most 5 hours to study every day. However, I tend to eat at restaurants and hence has 7 hours for the test preparation. As a result, I, eventually, got the higher score in this test.
All in all, as far as I am concerned, considering the advantages for eating at restaurants, having my three meals at restaurants is preferable to cooking at home. For the latter will sacrifice more important and more rewarding things.