11.  Sometimes stereotypes can do help to us.

12.  This can help us avoid some troubles.

13.  When other students had not got adequate time to finish the task, he was always the first initiative to help.

14.  In addition, you may prefer to solve your problem coming up against in life by yourselves rather than ask her for help, since she is always impatient with you and your request is more like a mercy in her view.

15.  Participating in classes actively can not only help students understand new knowledge better and reduce misunderstandings between students and teachers, but also enhance teachers' enthusiasm and warm the class's atmosphere.

16.  This may help reduce the stereotype on campus.

17.  "Since I don't have too much work to do here, can you help me borrow some books from the library?

18.  Self-study is good in some extent, but teachers' guidance can help me find key points quicker.

19.  I lost my purse a week ago, and I went to police for help.

20.  He could not help but crane to take a peek again.