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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】What did ancient astronomers do?
A.
They looked for patterns in the stars and in time.
B.
They thought that the stars changed shape over the course of a year.
【单选题】There is an inherent problem with this type of car.
A.
unusual
B.
unavoidable
C.
annoying
【单选题】Successful companies are often led by great visionaries.
A.
people with a lot of money
B.
people with a lot of power
C.
people with a lot of imagination