阅读理解。 Have you ever complained why life is so tiring? Does the sky sometimes seem dark to you? Are your studies sometimes not successful? Well,friend,cheer up and smile all the  time．If you see the world with your warm heart,you'll find that the whole world smiles to you．While in school,sometimes you are tired of your lessons,but have you ever noticed the happy smile  on your teacher's  face when you did a good job? One day it is fine．Just before you want to go out,it suddenly starts to rain．Maybe you would feel very sad and start complaining about the weather．But dear friends,why don't you sit down and listen to the free concert that the nature offers you? And  with the  timely  rain,crops in the fields will grow better and better and farmers will have a good harvest． Although everyone wants to succeed in what he  tries to do,sometimes failures can't be avoided．I think failure is not terrible,and the terrible thing  is  that we are afraid of it and give up hope．When we face failure,we must be confident n ourselves,draw a useful lesson from it and try our best to finish what we have decided to do．As a popular saying goes,'Failure is the mother of success．' Attitude decides everything．With  an optimistic  attitude life is easy  and  pleasant． Let's smile to whatever we meet and the whole world will smile to us． 1．People sometimes complain_______ A．the sky is always dark B．their studies are successful C．they see the world with their heart D．life is tiring 2．According to the passage,in school,_______ A．the students don't like their lessons B．the teachers will be happy if the students do good jobs C．the teachers don 't like their teaching D．the teachers are tired of their work 3．When we face failure,we_______ A．must be confident in ourselves B．shouldn't be afraid of it C．shouldn't give up hope D．all of the above 4．If there is a timely rain,_______ A．you want to go out B．you can listen to a concert C．crops in the fields will grow better D．farmers can't have a good harvest． 3．When we face failure,we_______ A．must be confident in ourselves B．shouldn't be afraid of it C．shouldn't give up hope D．all of the above 4．If there is a timely rain,_______ A．you want to go out B．you can listen to a concert C．crops in the fields will grow better D．farmers can't have a good harvest．