As I was sitting down for dinner,the telephone ________ring.

A．should            B．must             C．could             D．would

Global warming could make humans ___36___, warn scientists who __37___ to have found __38___ that it caused the world’s first horses to shrink nearly 50 million years ago.

In fact, a team from the universities of Florida and Nebraska says it has found a __39___ between the Earth __40___ up and the size of mammals -- horses, in this __41__, the last time the world heated up.

The scientists used fossils to __42___ the ___43___ of horses from their earliest appearance 56 million years ago. __44__ temperatures went up their size went __45__, and vice versa（反之亦然）; at one __46__ they were as small as a house cat, said Dr Jonathan Bloch, curator of the Florida Museum of Natural History, was quoted by the "Daily Mail" as saying.

The scientists say that the __47___ warming could have the same __48__ on mammals -- and __49__ even make humans smaller. "Horses started out small, about the size of a small dog __50__ a miniature schnauzer(迷你型雪纳瑞犬). What`s surprising is __51__ after they first appeared, they then became even smaller and then __52__ increased in size, and that exactly __53__ to the global warming event, followed by cooling.

"It had been known that mammals were small during that time and that it was warm, __54__we hadn’t understood that temperature specifically was __55__ the evolution of body size," Dr Bloch said in the "Science" journal.

36．A. taller                   B. higher                  C. shorter                      D. bigger

37. A. announce            B. claim                 C. declare             D. broadcast

38. A. evidence           B. result                 C. sign              D. information

39. A. difference           B. gap                  C. condition           D. link

40. A. heating              B. freezing              C. cooling             D. clearing

41. A. case                B. way                C. occasion            D. direction

42. A. find               B. follow               C. date                D. allocate

43. A. evolution            B. exploration           C. growth             D. movement

44. A. With                B. Because             C. While               D. As

45. A. up                  B. away               C. out                 D. down

46. A. situation             B. occasion          C. point                D. place

47. A. international          B. current            C. past                 D. huge

48. A. effect               B. result              C. consequence          D. outcome

49. A. could              B. must              C. should            D. would

50. A. as                  B. like                C. with              D. of

51. A. whether             B. when             C. that                D.  why

52. A. specially             B. fortunately           C. eventually         D.  dramatically

53. A. agrees               B. subscribes          C. corresponds       D. caters

54. A. so                B. but               C. and                D. for

55. A. driving              B. creating           C. working           D. operating

My English-Chinese dictionary has disappeared．Who ________have taken it?
A．should B．must C．could D．would

.

My English-Chinese dictionary has disappeared. Who _______ have taken it?