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大全446
446. It may be another fifteen years before spacecraft from Earth again venture to Mars, a planet now known to be cold, (划线部分为 again....to be,不知道为什么不能编辑) dry, and probably lifeless. (A) again venture to Mars, a planet now known to be (B) venture to Mars again, a planet now known for being (C) will venture to Mars again, a planet now known as being (D) venture again to Mars, a planet that is known now to be (E) will again venture to Mars, a planet known now as being
答案是A; 问题是spacecraft是单数名词,谓语动词不是应该与之相匹配么?NN们解答一下吧!
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