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• 49. The culture of animal cells in the laboratory was initially more of an art than a science, restr
• 50. _______the disease can be transmitted through air is still uncertain.(A) Whoever (B) Which (C) W
• 51. You must take ____ when walking around, as the village has many rabid dogs.(A) considerations (B
• 52. Not everyone has the time to go the gym and there is no need to. _________ at home is very easya
• 53. Proper blood ______ is a fundamental feature of good health.(A) circus (B) circumstance (C) circ
• 54. The oxygen from the air we _____ is carried through the blood from the lungs to all other partso
• 55. Today in the developed world, most blood donors are unpaid ______ who donate blood for acommunit
• 56. Plants are one of the two groups into which all living things were traditionally divided； _____
• 57. Plants usually ______ soil primarily for support and water.(A) rely on (B) grow into (C) come ab
• 58. The medicine is still in the experimental stage, but if it works, it _____ many people.(A) helps
• 59. ______ appetite over the course of 24 hours may not indicate a serious concern, but after the 24
• 60. Because of ambiguous or deceptive labeling of the dog food, the owner _____ will feed aninadequa
• The oceans are dying. But it’s not__ (61)__ late to help. Plastic marine litter affects at least 267
• 【題組】62. (A) includes (B) including (C) include (D) included
• 【題組】63. (A) As a result (B) However (C) By the way (D) On the one hand
• 【題組】64. (A) interest (B) threat (C) blessing (D) fortune
• 【題組】65. (A) become (B) had become (C) has become (D) have become
• There’s a certain humanity in dogs. They always seem to have your best intentions in mind, theyalway
• 【題組】67. (A) when you are (B) when are you (C) when do you (D) when you
• 【題組】68. (A) In support of (B) On account of (C) According to (D) In consequence of
• 【題組】69. (A) over (B) upon (C) then (D) than
• 【題組】70. (A) stops (B) allows (C) forbids (D) rejects
• Fire has been__(71)__ to civilizations for millennia, providing heat in the cold, light in the dark,
• 【題組】72. (A) like (B) such (C) so as to (D) in that
• 【題組】73. (A) stand for (B) in support of (C) account for (D) account to