写英语作文时，扩展的内容一定要紧扣主题，千万不要写那些与主题不相关的内容。扩展时要注意短文的字数，要写够词数，以避免由于字数不够引起的扣分。
高二年级的英语作文优秀范文一：
夏天的校园生活
Prospective students can get a taste of campus life during the summer months by spending a day or evening at Penn State New Kensington.
During the Spend a Summer Day and Spend a Summer Evening events in June, July, and August, participants can meet staff and current students, and find out all they need to know about admissions, financial aid and student life. Opportunities to tour the campus are available and a free lunch and entertainment are provided. The first Spend a Summer Day program is a weekend event slated from 9:30 a.m. to 12:30 p.m. on Saturday, June 20. Adult learners who can't make it during the day due to work commitments may spend a summer evening on campus from 6:30-9:00 p.m. on Thursday, July 30. The final Spend a Summer Day is a weekday event, set from 9:30 a.m. to 12:30 p.m. on Thursday, Aug. 6.
高二年级的英语作文优秀范文二：
An easy but difficult choice
Along with the rapid step of science development, men have got more and more achievements. Especially in biological field, scientists are creating miracles every minute. In recent years, they are decoded the gene code of human being. People all over the world are astonished and excited. However, at the same time, it evokes many things which we should and must think carefully.
What s gene? I think we should know sometimes about DNA first. DNA is short for deoxyribonucleic nucleic acid. It s the most important heredity substance in our bodies, which almost decides all the shape and properties. On it are there thousands of genes arranged in sequence. Each of them carries a genetic message that decides your appearance, intelligence or any other character. So there s no doubt that decoding the gene code will do an great effect on us and has a profound and far-reaching meaning.
This scientific fruit would absolutely bring some advantages. If it was in use, agriculture would benefit from it a lot. The output of crop would increase. They could resist all kinds of diseases and have a strong ability of disaster-proteeting. Animals may be safe because scientists can continue a plant by genetic optimization or cloning when it is in danger. For humans, it will contribute to medicine. Hereditary diseases reduces a lot. Many incurable diseases can be treated. We will enjoy our lives without pain.
Thus we live longer naturally. Then the population of the earth increases rapidly. This would cause the danger of resource. In nowadays, freshwater, coal, petroleum are not enough yet. How does our fragile planet under take such a great need? At that time, a good many people will suffer poverty, starvation, diseases, etc. It could even cause the third World-War.
In addition to the war, we re faced many other problems. The simplest thing is that how the target distribute. Who can decide it? Is the achievement first used on scientists or stars? Is it appreciated by nobles or tested on civilians? So simple a thing is so hard to solve.
If we were to reform our genes for same reason, it might cause the disorder of. It would lead to serious aftereffects. For example, some new diseases will come and they may be incurable as cancer. Nobody can control at that time.
Contemporary society has many kinds of discrimination. Discrimination of religion belief, ethnic, or is harmful to the liberty of the world. Imagine that if you were a manager of a company, and you were choosing an assistant, from a crowd of people. You master everyone s genes. Who will be lucky enough to be chosen? Mostly, the cleverest one. Therefore, a man who has ordinary IQ will be hard to live. This situation can be called genetic discrimination. Of course, it s bad to the stability of society.
What s worse, if some terrorists mastered this technology, what our world be? They might regard the technology as a weapon, which could destroy human beings and ruin the earth. We would be under the control of evil power and live with pain forever.
In the end, I want to say that I m not sensationalizing it. It s a real choice we have to make. Science or Liberty? It seems a easy thing but humans are curious and want to explore by nature. If we want to enjoy our life and appreciate our homeland, we must calm down, forbear our strong desire. Don t forget that we re never the overlord of our planet, but only the quests of the earth.
高二年级的英语作文优秀范文三：
Christmas in America 美国的圣诞节
Christmas is the most important festival in the western world. It falls on December 25th. When my mother and I stayed in America, we were invited by one of my mother s friends to have Christmas with an American family. We bought some presents for our American friends on our way to their house.
They had prepared different kinds of gifts for their family and guests when we got to their house, such as Christmas candles, cakes, cards, little toys, biscuits and so on. A Christmas tree was placed in the comer of the brilliant hall. How beautiful it was! We were impressed by these. We had a big meal. After dinner, they told us some interesting stories about Christmas. We learned that Christmas had something to do with God. We went to bed at midnight. Though we knew the Santa Claus was not true, we were still waiting for the Santa Claus with white beard to bring us presents.And we received many beautiful presents the next morning.
This Christmas was really unforgettable. Not only did I have a good time, but also I knew something about foreign culture.