Our planet is about         years old.
A．35,000B．4600C．4600 millionD．500 million
C
句意；我們的星球大約有……的歷史了。根據(jù)地理知識(shí)可知，地球的年齡大約在46億年。故選C。
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任務(wù)型閱讀
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