题目内容
________ is the best student in our class?
A. Whom do you think B. Who do you think
C. Do you think who D. Who you think
B
【解析】略
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B.Saving the Earth
C.Travelling to Mars
D.A Newly?Found Place
B.Changing.
C.Planting.
D.Building.
B.find out its similarity to earth
C.avoid the dying away of many other species
D.find on Mars livingplace for the increasing humanbeings
B.terraforming Mars is theoretically simple
C.we have had some experience with terraforming our own planet:Earth
D.the development of science and technology is very rapid
B.Negative.
C.Skeptical(怀疑的).
D.Objective.