第2题: [单项选择]Agriculture was a step in human progress _________ which subsequently there was not anything comparable until our own machine age. A. in B. for C. to D. from 参考答案:C 答案解析:[解析] 在“介词+which”引导的定语从句中，介词的选择可以根据从句中的词语搭配来决定。与从句形容词comparable搭配的介词是to。comparable to意为“与……可以比拟的”。故C是
第31题: [单项选择]The error messages given by a C compiler show the message text，the most common (68) of the error，and a suggestion for fixing the error． A. consequence B. cause C. information D. result 参考答案:B 答案解析:[解析] C编译器给出的错误信息包括信息文本、最常见的错误原因和一个纠正错误的建议。
