This is a process happens when land becomes desert people cut down trees and dig up grass.
A. when; because B. that; because of C. when; because of D. which; because
完形填空（共20小题；每小题1.5分，满分30分）
阅读下面短文，从短文后各题所给的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
I teach biology at UNLV three times per week . Last Monday , at the beginning of class , I cheerfully asked my 21 how their weekend had been . One young man said that his weekend had not been so 22 . He had his wisdom teeth removed . Then he went on to ask me why I always seemed to be so 23 .
His question 24 me of something I’d read somewhere before : “Every morning when you get up , you have a 25 about how you want to deal with life that day .” I said . “I choose to be cheerful .”
“Let me give you an example ,” I continued , 26 all sixty students in the class . “In 27 to teaching here at UNLY , I also teach out at a 28 in Henderson , 17 miles down the highway from where I live . One day a few weeks ago I drove those 17 miles to Henderson . I 29 the highway and turned onto College Drive . I only had to drive another quarter mile down the road to the college . But just then my car 30 .I tried to start it again , but the 31 wouldn’t work . 32 I turned my flashers on , took my books , and 33 down the road to the college .”
“As soon as I got there , I called and 34 for a tow truck to meet me at my car after 35 . The secretary there asked me what had happened . ” This is my 36 day .” I replied , smiling .
She was 37 . “What do you mean ?”
“My car could have broken down anywhere along the highway . It didn’t .” I relied . “ 38 , it broke down in the perfect place : off the highway , 39 walking distance of here . I’m still able to teach my class , and I’ve been able to get the tow truck to meet me after class . If my car was meant to break down today , it couldn’t have been arranged in a more convenient 40 .”
I ended my story . In spite of the early hour , no one in my class seemed to be asleep . Somehow , my story had touched them .
1. A. students B. schoolmates C. children D. teachers
2. A. bad B. sad C. good D. free
3.A. grateful B cheerful C. hopeful D. thankful
4. A. reminded B. informed C. told D. warned
5. A. decision B. preference C. judgment D. choic
6.A. showing B. demanding C. commanding D. addressing
7. A. contribution B. addition C. devotion D. application
8. A. college B. school C. university D. institute
9.A. found B. exited C. crossed D. entered
10. A. broke B. ended C. died D. finished
11. A. instrument B. engine C. wheel D. light
12.A. So B. But C. And D Or
13.A. drove B. marched C. rode D. followed
14.A. prepared B. looked C. arranged D. waited
15.A. work B. study C. lunch D. class
16. A. usual B. lucky C. unusual D. unlucky
17.A. astonished B. excited C. pleased D. puzzled
18. A. Anyway B. Also C. Instead D. Still
19.A. beyond B. without C. within D. along
20. A. order B. way C. need D. situation
20. They found there was_____ to weigh such an elephant.
A. big enough nothing B. nothing enough big
C. enough nothing big D. nothing big enough
There is a board by the road, which _____ “Parking_____!”
A. writes, forbidding B. reading, forbidding
C. says, forbidden D. saying, forbidden
In order to produce more grain, it________that the area of farmland_____.
A. is demanded, being increased B. has been demanded, be increased
C. demand, should be increased D. demands, should increase
---Do you like the new pen?
---Yes, it_____ smoothly.
A. is written B. is writing C. writes D. wrote
