As John moved his bicycle out of the driveway, he heard his mo m shout, “Don’t forget to lock it!” He thought to himself that she was such a 36 . Really, what could 37 at that little library in the small prairie（大草原）town? The day, 38 most that summer, was bright and hot. As he 39 , sweat trickled（滴下） down. When he arrived at the library, he leaned his bike 40 the railing（栏杆） and, 41 his mother’s advice, didn’t bother to 42 it. The library was extremely 43 , filled with the distinct smell of books. 44 in the stacks（堆）, John spent longer than he’d imagined 45 just the right book. He waited patiently for his 46 , and watched 47 the librarian fed his card through the recorded machine. As he went out of the library, he saw his bike 48 down the sidewalk. Walking beside it was a boy, perhaps fif years old. “Hey! That’s my bike! What do you think you’re doing? G ive it 49 .” “Give it back! You’re 50 . It’s not yours.” John felt 51 with this boy and his words that the bike was his own. What could he do? He wasn’t at all sure 52 to deal with him. At that moment, John surprised himself. 53 a step toward the boy, he took 54 of his bike. “This bike is mine. You’ll have to give it back to me.” 55 by his determination, the boy let him go. John jumped on and rode home as quickly as he dared. He felt a little strange, however, and a bit older somehow, but he couldn’t quite put his finger on why. 36. A. housewife B. mother C. worrier D. talker 37. A. happen B. steal C. lose D. take 38. A. as B. with C. of D. like 39. A. went B. rode C. ran D. drove 40. A. to B. on C. at D. against 41. A. remembering B. thinking C. reminding D. ignoring 42. A. lock B. place C. mind D. care 43. A. hot B. warm C. cool D. cold 44. A. Missed B. Run C. Seated D. Lost 45. A. to choose B. choosing C. to search D. searching 46. A. turn B. chance C. book D. Bike 47. A. as B. because C. since D. while 48. A. move B. moving C. moved D. being moved 49. A. in B. out C. up D. back 50. A. laughing B. smiling C. cheating D. joking 51. A. angry B. glad C. sorry D. content 52. A. what B. how C. when D. whether 53. A. Walking B. C. Going D. Taking 54. A. hand B. lift C. hold D. finger 55. A. scared B. surprised C. worried D. disappointed