One day, a teacher was giving a speech to his students .He held upa glass of water and asked the cla——青夏教育精英家教网—

One day, a teacher was giving a speech to his students .He held up（举起）a glass of water and asked the class. "How heavy do you think this glass of water is ?"
The students' answers ranged（范围） from 20g to 500g .
"It does not matter on the weight itself .It depends on how long you hold it .If I hold it for a minute ,it is OK. If I hold it for an hour ,I will have an ache in my right arm .If I hold it for a day ,you will have to call an ambulance（救护车）.It is exactly the same weight ,but the longer I hold it ,the heavier it becomes."
"If we carry our burdens （负担）all the time, sooner or later ,we will not be able to carry on ,the burden becoming increasingly heavier ."
"What you have to do is to put the glass down ,rest for a while before holding it up again ."
We have to put down the burden sometimes ,so that we can be refreshed and are able to carry on .
So before you return home from work tonight ,put the burden of work down .Don't carry it back home. You can pick it up tomorrow .
Whatever burdens you are having now on your shoulders, let it down for a moment if you can .
【小题1】The teacher brought a glass of water to the class because ______
A. he was very thirsty B. his arms were strong C. it was a good example
【小题2】"A glass of water " in this passage referred to （指）______
A. knowledge B. the burden C .the time
【小题3】Accordign to the teacher ,you may feel ______if you put down the burden sometimes.
A. more energetic B. much heavier C. more stressed out （压力、紧张）
【小题4】This was a lesson about______
A. how to relax oneself in life B. how to solve a physics problem .
C. how to keep fit by drinking water
【小题5】Which of the following statements is TRUE according to the passage ?
A .You could become heavier and heavier if you held a glass of water in your hand .
B. All the students in the class knew what the weight of the glass of water exactly was
C. The teacher had a good way of making his lesson clear and easy to be understood

Top help you decide what might make a good pet ,we've put together a pet checklist .We've named some of the animals that are often kept as pets .We've shown some good points and bad points about each .And we hope it may help you make the best choice（选择）

Pick-a-Pet Checklist（清单）
Pets	Good Points	Bad points
Rabbit	Easy to keep Enjoy being petted Good to hold	Hard to house train Drop lots of hair Easily upset by high temperature
Raccoon	Can be very interesting Can be friendly when young	Against the law to keep in many states in the U.S. Can get unkind when older
Cat	Easy to feed & care for Can live indoors or out Fun to hold Very friendly	May scratch furniture Little pans can be messy May kill birds May make you sneeze
Dog	Come in many sizes Can live indoors or out Fun to love & play with Very friendly Can give safety	Can be smelly ,messy ,noisy Need to be licensed& trained May make you sneeze May bite(咬)if angry Need lots of attention