On a hot day, I decide to mow our extremely hilly lawn. It was likely to    21    a jungle（丛林）with weeds growing wildly. I need to mow it at once.
After several false    22      , I had to examine it and finally got our old lawn mower     23      . I was mowing and trying hard to push the machine uphill, which was really a hard job, for the machine was too old to work well. I was so   24  that I complained under my breath, so I decided to take a short break.
At the top of a rise, I   25  to see my 12-year-old John Thomas standing there, with a smile on his face and a glass of    26  in his hand.  "Here, Mom, "he said, "have a drink, Want me to help you? Dad   27  me work on hte flat places."
I  28   the ice water and went to sit in the      29  of a tall tree. As I took my drink, I   30    my son. To my surprise, he didn't seem to be    31   the normal mowing pattern. And he kept smiling at me   32   he worked. I wondered    33  made him so happy? I thought to myself.
After a while, he    34   mowing and looked in my direction. "Hey, Mom. Could you  35 here? "   "He's always　naughty like this, lazy again?" I said to myself    36     .  Then I stood up and walked across the lawn, noticing that he had missed a sizable spot. "John, you didn't..."  My angry words gradually became      37    , for the spot I thought he'd missed had been       38     mowed into the shape of a（an）   39  , suddenly I felt something warm and gentle rising from inside.
"Like it, Mom? It's mine and it's for you."  he asked with a big    40  .
"Now I'll finish the job."
21. A. turn on B. turn into     C. turn down  D. turn up
22. A. starts    B. words C. ends    D. behavior
23. A. work    B. move  C. going  D. flying
24. A. cheerful       B. tired   C. cared  D. boring
25. A. looked through    B. looked over       C. looked after       D. looked up
26. A. hot tea  B. chocolate    C. milk   D. ice water
27. A. asks      B. allows C. lets     D. agrees
28. A. drank   B. heated C. accepted     D. received
29. A. shade    B. leaves C. root    D. top
30. A. saw      B. watched     C. observed    D. noticed
31. A. feeling  B. finding       C. following   D. feeding
32. A. if  B. since   C. whether      D. as
33. A. what     B. that     C. all      D. it
34. A. continued     B. went on      C. stopped      D. finished
35. A. go over B. turn over    C. driver over D. come over
36. A. happily B. angrily       C. eagerly       D. anxiously
37. A. heavier B. thicker       C. louder D. quieter
38. A. carefully      B. carelessly   C. casually      D. comfortably
39. A. heart                  B. apple  C. hand   D. foot
40. A. sign      B. smile  C. surprise      D. sigh