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【单选题】
Benjamin Franklin discovered important facts about electricity. He showed that lightning is electricity.
A.
He read about electricity and understood the facts.
B.
He found new information about electricity.
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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 was her big discovery?
A.
the size of stars
B.
the brightness of stars
C.
the number of stars
【单选题】How does Dr. Watkins describe Leavitt?
A.
hard working and smart
B.
sad and intelligent
C.
famous and hard working