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, friends, 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 (及时的) 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 failure (失败) can't be
avoided (避免). 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 in 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 (态度) decides everything. With an optimistic (乐观的) 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. 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
4. 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
5. The best title of this passage is _______.
A. Smile and the World Smiles to You
B. Complaining About Life
C. Failure Is the Mother of Success
D. It Is Very Hard to Succeed
，所以该透镜的焦距
；凸透镜成实像时，物远像近像变小，所以此时应把光屏靠近透镜。