1.  A primary school teacher did a follow-up investigation on 150 students, to find that students ranking between no. 1 and no. 5 in class didn't become people of tremendous promise, but those ranking between no. 10 and no. 20 unexpectedly performed excellently in work.

2.  Also university life is supposed to be colorful and you can take part in various activities, which offer you a stage to perform and enhance your ability.

3.  They all performed extremely well in Math.

4.  Also, men should always perform heavy manual or industrial labors to save energy and time and achieve higher production efficiency.

5.  Therefore, for me, maybe getting a good result in an examination is not that hard, but it is difficult to perform well in real-life communication .

6.  However, he still assumes that women will necessarily be inferior in performing them.

7.  Firstly, I must attend every class and perform actively in the class activities.

8.  If you want to swim or to play ping-pong well, you must practice it over and over again until you can operate or perform it automatically.

9.  They perform important roles in the weather forecasting.

10.  Third, the most important is that each performs your own functions.