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Many scientists have believdd that there may be a of life on the Mar． [ ] A．mark

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Many scientists have believdd that there may be a of life on the Mar． [ ] A．mark

Many scientists have believdd that there may be a ________ of life on the Mar．

[]

A．mark

B．dignal

C．sigh

D．sign

试题答案

答案：D

标签：therethatbemayscientists

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