20．The maths problem was so difficult，but he managedto work（work）it out．

19．Our countryhas experienced （经历） great changes in the last 30years．

18．There are manyapproaches（方法）to improving students's writing ability．

17．The man spent much of his childhoodobserving（observe） birds in the wild．

16．A year ago，my friend and I went to a nearby town to attend a wedding．After the reception，we were waiting for a public transport bus to go back home．It was nine o'clock at night，and although many buses passed，none stopped．
We waited for an hour and were getting desperate．We wouldn't be able to stay overnight because it was a weekday，and we both needed to work the next day．It was almost 10pm when a family who had attended the same wedding passed by in their car．Probably sensing that we were waiting for some means of transport，they stopped and gave us a lift．I was so touched by their kindness，and I expressed my gratitude to them．
When we reached my hometown，the family dropped us at the nearest point from where we could catch a shared taxi to get back to the spot where we had parked our bike．On the way，a laborer stopped the taxi．The driver saw his clothes and asked him whether he had money to pay the fare．
The laborer shook his head and said，"No"．
On hearing this，the driver refused to take him．I remembered my own plight a few minutes earlier，and I told the driver to allow him to sit with us，as I would pay his fare．
What an immediate opportunity to pass on the family's act of kindness!That night，I felt light-hearted and I went to sleep happily and filled with joy about what I had gotten to do．May this chain of kindness continue!

4．Why the author and his friend waiting for a bus at nine o'clock at night？B
A．Because they were going to attend a wedding．
B．Because they wanted to go back home．
C．Because they intended to meet a family．
D．Because they planned to help a laborer．
5．What was the driver's attitude toward the laborer's asking for a lift？C
A．Positive．
B．Friendly．
C．Uncaring．
D．Respectful．
6．The underlined word"plight"in paragraph could best be replaced by"A"．
A．trouble
B．opportunity
C．kindness
D．tiredness
7．What is the best title for the passage？C
A．A Kind and Helpful Family
B．An Unusual Wedding
C．Magic Chain of Kindness
D．Attitude Decides Everything．

15．学校的体育馆有很多问题，如使用率不高、设施陈旧等．假如你是李华，请你用英文给校长写一封100-120词的信，就如何改善体育馆，更好地发挥其作用，提出一些建议，并说明理由．
注意：1．建议不少于两条．
2．文中不得透露个人姓名．
3．信的抬头与落款已给出（不计入词数）．
Dear headmaster，
I'm writing to talk about the stadium of our school．I find our stadium isn't functioning as it should be．Most of the time it is closed and only a few sports facilities are available，which can't cater to students'needs．As we know，sporting is very important to students'physical and mental health．So I suggest our school should improve our stadium．
First，we had better extend its opening time so that students can exercise even on rainy days or during break time．Second，more sports facilities are needed so that we can participate in various sports activities．For example，a swimming pool will be widely welcome．I think it is necessary for our school to start a swimming lesson to teach students the survival skill．
We hope that you will seriously consider my suggestions．
Yours sincerely
Li Hua．

14．Whencompleted（complete），the museum will be open to the public next year．

13．He was sitting there，lost （lose） in thought．

12．According to Iegend （传奇），he escaped by leaping from the cliffs into the area．

11．As a child，you are notallowed（允许）to smoke．