46. She remains confident and ______ untroubled by our present problems.
A) indefinitely
B) infinitely
C) optimistically
D) seemingly
注:infinitely 非常地,无限地,极大地
47. Fiber-optic cables can carry hundreds of telephone conversations ______.
A) simultaneously
B) spontaneously
C) homogeneously
D) contemporarily
注:三剑客词汇:simultaneously,spontaneously,contemporarily
48. The police were alerted that the escaped criminal might be in the ______.
A) vain
B) vicinity
C) court
D) jail
注:vicinity 附近,邻近
49. Whether you live to eat or eat to live, food is a major ______ in every familys budget.
A) nutrition
B) expenditure
C) routine
D) provision
注:1. expenditure 花费
2. budget 预算
50. Now a paper in Science argues that organic chemicals in the rock come mostly from ______ on earth rather than bacteria on Mars.
A) configuration
B) constitution
C) condemnation
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