When making modern cameras people began to （ ）plastics for metal.
A.surround B.substance C.stretch D.substitute
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When making modern cameras people began to （ ）plastics for metal.
Inductive reasoning involves making useful generalization about the environment [A]as a whole,based on a necessarily limited number of observations. [B]As so, it is an important tool that people [C]use to build the models of reality they need to function effectively. [D]While conclusions can be wrong if observations are faulty or are drawn from an unrepresentative sample, if properly used, it can be incredibly powerful.
Blues comes from that sense of not being at the centre, “from nothingness? From want, from desire,” as W. C. Handy put it. Bessie became the incarnation of that absence, darkness, death”.
One major obstacle [A]to economic development is population growth. [B]The populations of most developing countries grow at a rate much faster than [C]that of industrialized countries. One reason for this growth is the high crude birth-rate—the number of [D]live births per 1,000 people.
The （ ）is nearly dead, so I cannot start the car again.
But two hurdles stand in the way of Russia’s realizing its space dreams: a collapsing public-education system and a brain drain that for decades has been siphoning off the country’s highly trained engineers as they move to better-paying jobs in the West.
