31.  In all societies the obvious biological difference between men and women is used as a justification for forcing them into different social roles which limit and shape their attitudes and behavior.

32.  I had read hundreds of books from literature to science, both in Chinese and English, and I used to read English papers regarded to tumor, stem cell and the regulation of gene expression.

33.  It is almost eleven years that I have been learning English from middle school, but I used to spend poorly two fully years on studying English.

34.  Every woman who secures an official position or achieve outstanding success will be used as an example of gender equality.

35.  Firstly, the textbook and information should be used well.

36.  It's the obvious biological difference between men and women used as a standard for forcing them into different social roles.

37.  Men and women's roles used to be absolutely different for times and culture backgrounds but it turns out to be a little ridiculous if we allow no change today.

38.  As in most Asian countries, housewife used to be the synonym for women.

39.  By chance, I used the way to recite the text to learn English, and found that the effect is very good.

40.  On the other hand, In order to improve my ability of reading English text, the majority of my time was used to remember words.