还有一道，急~~~~~，答案是A，为什么？

lilya

Research during the past several decades on the nature of language and the processes that produce and make it understandable has revealed great complexity instead of underlying simplicity.
(A)        that produce and makr it understandable has revealed great complexity instead of underlying simplicity
(B)        Of producing and understanding it have revealed not underlying simplicity but great complexity
(C)        By which it is produced and understood has revealed not underlying simplicity but great complexity
(D)        By which it is produced and understood have revealed great complexity rather than underlying simplicity
(E)        By which one produces and understands it have revealed great complexity instead of underlying simplicity

lilya

自己up一下，见谅！

tanggu

首先，Research是主语，所以谓语动词只能用has,（注意搞清主句的主谓位置；）B,D,E排除；
其次，C中的‘by which it is produced...’中定语从句有误。变化一下就是：the processes produced and understood it. 句意不通，应该是processes make it understood，也既：不是这些程序理解语言，而是这些程序使语言可以被理解。
还有，从句意和语感上判断，是要强调great complexity,所以在这种表达上把great complexity放在前面感觉上更通畅一些；‘has review not underlying simplicity but great comoplexity‘感觉十分别扭，虽然语法上没有问题。

lilya

非常感谢！//bow！！