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When the teacher asks a question in class，Wang Xiaobin never raises his hand and this situation is very common at middle schools.This 15-year-old boy always waits for other classmates or the teacher to give the answer. "What if my answer is wrong？" Wang asked.
   Wang said only six or seven students in his class raise their hands when a question is asked. "I think it's a problem that may affect（影响） our studies，but I am afraid of making mistakes in front of my classmates，" he said.
   Hu Wei，a teacher from No.6 Middle School，listed some possible reasons to explain why students don't raise their hands： "They lack（缺乏） of confidence，they are afraid of showing off，or they're afraid of losing face by giving wrong answers."
   To encourage students to raise their hands in class.He suggests that teachers should repeat the question，then try to guide and encourage students to offer their answers.He also advised students not to be shy，but brave enough to try.
   Sun Pin，16 of Fujian，always raises her hand as soon as she comes up with the answer，even if she isn't sure she has got it right.Sun can't understand why some of her classmates keep silent in class.She enjoys raising her hand a lot. "It keeps me enthusiastic（热情的） and confident to express my idea." Sun said， "Raising my hand has really made me excellent."
（1）Does Wang Xiaobin raise his hand when the teacher asks a question in class？
（2）Why doesn't Wang xiaobin raise his hand？
（3）Why don't students raise their hands？
（4）What advice did Hu wei give to students？
（5）What opinions does Sun Pin have about raising hands？

Wang Xiaobin never raises hand.Because he is afraid of making mistakes.Students don't raise their hands because they lack of confidence，they are afraid of showing off，or losing face by giving wrong answers.Hu Wei advised students not to be shy，but brave enough to try.Sun Pin thinks raising hands can keep her enthusiastic and confident to express her idea.It has made her excellent.

Wang Xiaobin never raises hand.Because he is afraid of making mistakes.Students don't raise their hands because they lack of confidence，they are afraid of showing off，or losing face by giving wrong answers.Hu Wei advised students not to be shy，but brave enough to try.Sun Pin thinks raising hands can keep her enthusiastic and confident to express her idea.It has made her excellent.