根据以下这篇文章，出一篇难度相近，主题为科学研究等的英语阅读理解题，要求有15处完形填空选择题。m. Reading Comprehension (45%)
Section A
Directions: For cach blank in the following passage there are four worcds or phrases marked A, B, C and D. Fill in each blank with the word or plhrase that best fits the comext.
Everybody loves to hate invasive species. The international list of invasive species—defined as those that were introduced by humans to nev places, and then _41_ —- runs to over 4, 000. In Australia and New Zealand hot war is fought against introduced creatures like cane toads （蔗蟾蜍） and rats.
Some things that are unconroversial （无争议的） are nonetheless oolish. With a few important exceptions, 
campaigns to _42_ invasive species are merely a waste of money and efiort — for reasons that are parly practical and parly philosophical.
Start with the pracical argumenls. Mostinvasive specics are ncithcr terribly sucessfi nor very_43_.
Brions bhink thcmsclves surrounded by forcign plants._4A_, Bitain's invasive plants are not widcsprcead, not spreading especialy quicky, and often less of a(n) _45_than vigorous native plants. The arival of new species almost ahvays __46_biological diversity （多样性） in a region; in many cases, a flood of newcomers drives no native species to extinction. One reason is that invaders tend to colonise _47_habitats like polluted lakes and post-industrial wasteland, whare little else lives, They are nature's opportunists.
The philosophical reason for staring war on the invaders is also _48_ . Elimination campaigns tend to be _49_ by the bolicf that it is posible to restore balance to nature —— to rcturn wods and lakes to the state before human _s0 . That is misguided. Nature is an cvecrbasting mess, with speiss corstantly cmerging.wihdrawing and hobridizing （张交）, Humans have only quickened these processes. Going back to ancicnt habitats is becoming_51_ in any ease, bocause of man-made climate change. Taking on the invaders is a(n)
_S2_gesturg not a means to an achievable end.
A reasonable attitnde to invaders need not imply passivity. A few foreign speies are rmuly_53_ and
should be fought: the Nile perch - a fish. has helped drive many species of fish to extinction in Lake Victoria.lt makes sense to _54_ pathogens （病阔）, especilly lhose hat destroy whole nalive tree species, and to slop known agricultural pests firom gaining a foothold. Fencing off wildlife reserves to create open-air ecological museums is fine, too. And it is a good idea for European gardeners to destroy Japanese plants, just as they give no apace to native harmfiul grassos like bindweed and ground cder. You can garden in a garden. You cannot garden _55_ . That is universally accepted.41. A. multiplied B.shrunk C. disappeared D. harvested
42. A. conserve B. clim inate C. investigate D.prioritize
43.A. healthy B. intentional C.harmful D.profitable
44. A.As a result B. For example C. By contrast D. In fact
45. A. attraction B. dominance C.annoyance D.substitute
46. A. increases B. destroys C.reveals D.targets
47. A. oppressed B. disturbed C.culivated D. preserved
48. A.acceptable B. needless C.mistaken D.convincing
49. A. fucl(l)ed B.organized C.interrupted D.grected
50. A.civilization B.interference C.interaction D.maintenance
51. A. tolerablc B. impossible C.bencficial D.critical
52. A.rcluctant B.disorderly C. invalid D.unbalanced
53. A. damaging B.flexible C. doubtful D.outstanding
54.A. pick up B. take in C. keep out D.turn down
55. A.agriculture B.vegetation C.atmosphere D.nature