If our bodies are not strong, our spirit to do things will certainly be quite dull. And at the same time, we are lack of energy (ies) to study. Diseases will only attack the weak, but not the strong.
Why are our bodies not strong? Because we do not pay attention to exercise. For this reason, we students must often take different kinds (sorts) of exercise in the gym.
Exercise helps us (to) strengthen our bodies and avoid disease. It also teaches us cooperation, for most exercise is played by team.
I am always interested in traveling. My reasons are quite (extremely) simple and clear. If anybody is not satisfied with my viewpoint(s), I shall be greatly surprised at his ways of thinking.
In the first place, traveling increases our knowledge. Only by traveling can we see （因为用（only）开头，主动词须颠倒）things outside our home town.
In the second place, traveling is good to our health. While we are traveling, we usually exercise our bodies.
In conclusion, I earnestly hope that everybody must seize (grasp at) the opportunity of traveling.
My aim is to become a good citizen so as to be able to render service to the (my) country. However, to become a good citizen is not an easy thing. He has many duties to fulfill.
The first duty of a good citizen is to love his country. He is to (must) be ready to sacrifice even his own life for the country.
His second duty is to obey the law and help the government (to) maintain order. If everybody can do so, the country will be rich and strong (powerful).
我的志向是做一个好公民以便能给国家效力。然而，做一个好公民不是一件容易的事情。他有许多责任要尽。
一个好公民第一件责任是爱他的国家。他须准备为国家牺牲自己的生命。
他第二件责任是服从法律并且帮助政府维持治安。如果人人都能这样做的话，国家必定富强。
第十六天：THE NATIONAL FLAG 国旗
it is the duty of every citizen to honor the national flag. Why? Because the national flag is the symbol of a (the) country. To respect it means to respect the country. In other words, if a man loves his country, he must love the national flag.
In school, the national flag is usually raised at a certain time every day. Then the principal, teachers, staff and students are to (must) stand before it and sing the national anthem. It is indeed extremely meaningful to attend such a ceremony.
It is impossible for us to make our country rich and strong without developing education. Why? Because education gives people knowledge and teaches them how to become good citizens so as to be able to serve their country. No wonder they say that education decides the progress, prosperity and civilization of a country.
At present (Nowadays) most countries in (of) the world are enforcing compulsory education. It is necessary for all kinds of people, both rich and poor, to receive education. Taiwan is an exception as well not.
It is a matter of course that industry will bring us success, wealth and good luck. I am sure that a hard-working person can always succeed in the work which he wants to do. This is unchangeable truth.
Idleness is the opposite of industry. It is the source of all evil. An idle man only enjoys playing and making pleasures. That he is doomed to failure is of no doubt. We should not follow his example.