21.  I think as long as I try my best to study in a new style, I will gain my goal.

22.  As the old saying goes, interest is the best teacher to learn English well .

23.  In my spare time , listening to English songs and watching English movies will be my best choices to improve my hearing ability .

24.  The best way is to read more, listen more.

25.  That's why that appropriate is best.

26.  To sum up, I believe men and women should play different roles in life, which is not only due to the natural differences, but the best choice for the society as well.

27.  Third, as an important part of society, university is one of the best places to invent things.

28.  Of course, if I had the opportunity, I will communicate with foreign friends , it's the best way to improve my English skill.

29.  There's a rule called Optimality Theory in the Behavior Ecology, which means that the nature tends to select the best combination of different species' behaviors so that the optimum efficiency can be achieved.

30.  Our teacher will give us a variety of reading materials and all-round training, so I must do my best to follow her.