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.
A.the forming of bricks out of mud or clay, and, after some preliminary air drying or sun drying, they are laid
B.forming the mud or clay into bricks, and, after some preliminary air drying or sun drying, to lay them
C.having bricks formed from mud or clay, and after some preliminary air drying or sun drying , they were laid
D.to form the mud or clay into bricks, and , after some preliminary air drying or sun drying, to lay them
E.that bricks were formed from mud or clay, which, after some preliminary airy drying or sun drying, were laid
答案是D没有问题，但OG解释里说“the ways to build in the first clause is narrowed to the single way to form and to lay in the second clause" ， 非常不理解这句话的意思。。。 | 
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发表于 2011-3-22 18:43:35
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