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题库 / GmatLaCourse-SC-8
There are several ways to build solid walls using just mud or clay, but the most extensively used method has been the forming of bricks out of mud or clay, and, after some preliminary air drying or sun drying, they are laid in the wall in mud mortar.
the forming of bricks out of mud or clay, and, after some preliminary air drying or sun drying, they are laid
forming the mud or clay into bricks, and, after some preliminary air drying or sun drying, to lay them
to form the mud or clay into bricks, and, after some preliminary air drying or sun drying, to lay them
略
略
题目分析：
“把泥和粘土放在砖头里”和“把他们用水泥安在墙里”都是the most extensively used method（应该说是两个步骤），两者应该保持平行。答案为(C)。
平行结构理解没问题，有一个疑问是，如果有选项是forming.... and laying是不是会更好？感觉这里作宾语，谓语动词has been是弱约束
个人看法：把mud和clay做成砖块产生了状态的改变，所以用不定式
同意楼上加1，想补充的一点是method to do....所以根据method 的搭配不定式更好；同时和上句的way to do结构平行。
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