One day, the gardener heard that kind of conversation. After watering the flowers as usual, he said, "You both have done your work very well. Now I am going to carry you back. I want you to look carefully along the path."

　　Then the two buckets did so. All along the path, they noticed, on the side where the new bucket was carried, there was just bare(光秃秃的) earth;on the other side where the old bucket was carried, there was a joyous row of wild flowers, leading all the way to the garden.

4．What does the underlined word "dilapidated" probably mean?

　　A . great. B. dark. C. worn-out. D. excellent

5． What was the old bucket ashamed of?

A. His past. B. His aging. C. His manner. D.His leaking.

6．The new bucket made conversations with the old one mainly to________.

A. laugh at the old one

B. take pity on the old one

C. show off its beautiful looks

D. praise the gardener's kindness

7．Why was the old bucket still kept by the gardener?

　　A. Because it was used to keep a balance. B. Because it stayed in its best condition.

　　C. Because it was taken as a treasure. D. Because it had its own function.

　C

On April 2，we said goodbye to Tiangong I，China's first space lab．According to the China Manned Space Agency(中国载人航天)，Tiangong I re-entered the Earth's atmosphere （大气层）and fell into the South Pacific Ocean．

　　There are many spacecraft that are still in orbit above the Earth．They are flying at heights ranging from 300 to 1,000 kilometers．After finishing their trips，they will all re-enter the Earth's atmosphere like Tiangong I．

　　There are two types of re-entries：controlled(受控的)re-entry and uncontrolled re-entry．

Some satellites(卫星)and manned spacecraft come back to the Earth in a controlled re-entry．Scientists calculate(计算)the path of the falling spacecraft and its