GWD-10-Q3 Forprotection from the summer sun, the Mojave lived in open-sided, flat-toppeddwellings known as shades, each a roof of poles and arrow weed supportedby posts set in a rectangle. A. each a roof of poles and arrowweed B. each a roof of poles and arrowweed that arebeing C. with each being a roof of poles andarrowweed D. with roofs of poles and arrowweed to be E. with roofs of poles and arrowweed that are
答案是A,是用独立主格。可是E为什么不对呢?感觉也很通顺呀
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