GMAT 考满分题库

OG16 - 语法SC - 38
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.
  • Athe forming of bricks out of mud or clay, and, after some preliminary air drying or sun drying, they are laid 分析该选项
  • Bforming the mud or clay into bricks, and, after some preliminary air drying or sun drying, to lay them 分析该选项
  • Chaving bricks formed from mud or clay, and, after some preliminary air drying or sun drying, they were laid 分析该选项
  • Dto form the mud or clay into bricks, and, after some preliminary air drying or sun drying, to lay them 分析该选项
  • Ethat bricks were formed from mud or clay, which, after some preliminary air drying or sun drying, were laid 分析该选项
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正确答案: D

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