The expression "the cause of the disturbance" in paragraph 2 refers to______.

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The expression "the cause of the disturbance" in paragraph 2 refers to______.

A. the large tidal wave

B. the powerful tidal pull

C. the star coming near the sun

D. one of the sun's planets

参考答案:

C49.答案为C 根据上下文可知动荡的原因是其他星球的靠近,因此选C。