A 项的错误主要是时态不正确, the meaning of this sentence is : the use of the new tech is as remarkable as the devel of the compact disc,所以正确的时态应该是 what is.... ,这样后面用现在完成时才make sense
was 和 has been时态不符。
was 和has been时态不恰当;句式啰嗦
was 和后面的has been 时态不一致
was 与 has been 的时态不符,而且不能展现出比较所需要的the development...和the use...的平行结构
时态……
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随时随地练习