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During the twentieth century, the study of the large-scale structure of the universe evolved from the theoretical to the practical; the field of physical cosmology was made possible because of both Einstein's theory of relativity and the better ability to observe extremely distant astronomical objects. A because of both Einstein's theory of relativity and-->because of 后面不可以加句子. B by both Einstein's theory of relativity and-->R, 因为前一句话是被动语态,用both..and..连接theory和ability可以很好的表达cosmology possible的原因, C by Einstein's theory of relativity and also-->and 前后不平行,应该在加一个by。 D because of Einstein's theory of relativity and also-->because of 后面不可以加句子,and前后不平行 E as a result of both Einstein's theory of relativity and |
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