根據(jù)句意和漢語注釋，在答題卡標有題號的橫線上，寫出單詞的正確形式。
【小題1】I’m so helpful that it's my ______ (please) to help give a seat to somebody in need.
【小題2】The final-exam is coming. The students are ______ (active) revising for tests.
【小題3】Because many factories pour waste water into the river, we must take action to change the______ (pollute) environment.
【小題4】It’s known to all that this trail is the ______ (far) one we have ever walked.

閱讀短文，根據(jù)短文內(nèi)容，從短文的五個選項中選出能填入空白處的最佳選項。　有一個選項為多余選項。

         A funny thing happened to my sister Tina last month. She lives in Japan and teaches English. In Japan, people don’t usually wear their outdoor shoes in the house or in school, and a lot of buildings have places for shoes. So her school ahs a special place for shoes.     1.        

         Tina teaches English in the evening. One Friday, she went to school, and she put her shoes in the shoe box—as usual. Then she had an interesting spoken English class with her students.     2.      But to her surprise, her shoes weren’t in the box. There was only one pair of those there, and they weren’t her hoes! She had to get home in a hurry.    3.          

         On Monday, at her next English class, her shoes were in a shopping bag on her desk! There was a note that said, “I’m so sorry. I took your shoes by mistake!”    4.       Somebody felt a lot of shame!

On the first day of school our teacher let us know someone. Looking out, we found an old woman 16 at the door. She said, “Hi, my name is Susan, I’m seventy years old.” While we were  17 what made her take this challenge (挑戰(zhàn)) at her age, she said with a smile, “I'm here to meet a rich husband, get  18 , have two children and travel together.” Hearing this, all of us laughed. “In fact,” she went on, “I always    19 of having a college education, and now I’m getting  20 !”
After class we had chocolate and milk together. We became good  21 . I often listened to this “time machine” as she shared her study with me.
At the end of the term we invited Susan to give us a  22 . When she was stepped up to the front, suddenly she found she took the wrong paper. She felt a little frustrated（沮喪的） and said, “I'm sorry. I’m so nervous that I can’t get my ready talk    23 , so I have to tell you  24 I know .”
In her speech she told us, “We don’t stop playing as we are old, we grow old because we stop playing. The secret of staying  25 , being happy and getting success is that we should laugh and find something  26 every day. I think there is a great  27 between growing old and growing up. I am seventy now. If I  28 in bed for one full year and never do anything. I’ll become seventy – one. Since anybody can grow older, my idea is to grow up by always finding the chance in change. Growing older can’t be avoided(避免的), growing up can be  29 . It’s never too late to be all you can be possible.”
During the four years’ study, it was so easy for Susan to make friends  30 she went. In the end, the wonderful woman got a college degree.