Recently physicians have determined that stomach ulcers are not caused by stress, alcohol, or rich foods, but a bacterium that dwells in the mucous lining of the stomach.
- not caused by stress, alcohol, or rich foods, but
- not caused by stress, alcohol, or rich foods, but are by
- caused not by stress, alcohol, or rich foods, but by
- caused not by stress, alcohol, and rich foods, but
- caused not by stress, alcohol, and rich foods, but are by
这题答案是C, 偶选了B.
1问:B为什么错呢?平行结构用的蛮好呀。
2问:C,D,E 中,be caused not by 不别扭吗?难道be not caused by 不对吗?
谢谢哪位nn帮忙解答一下?
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