31.  They both thought, and they knew that no one would come to do some clean for them, and few students were on campus in fact, especially the job must make them exhausted.

32.  That must be not as easy as we think.

33.  The main topics in their life must be science or other academic contents and the choice they made must be rational and logical.

34.  As a result, I must adjust my plan and set clear goals for English learning .

35.  However possessed diverse characteristics, men and women should and must different roles to play in relationships in order to keep a good balance.

36.  Meanwhile, the woman must act as a perfect housewife to prepare all the cook, laundry and gardening.

37.  As far as I am concerned, first we must be aware of the issue and then we can do something to help.

38.  The statement is "women and men should hold different roles", it is obvious to see the word "should" instead of "must".

39.  I want to emphasize that all jobs must be open for both men and women, but take the one which is most fit for yourself.

40.  For these stereotyping, I would like to say those must still be undereducated to agree with these ridiculous thoughts which can be dated back to primitive eras.