53、 A recent study has found amoxicillin, long a standard treatment for ear infections, as being about as effective as newer, more expensive antibiotics and causing fewer side effects.
　　(A) amoxicillin, long a standard treatment for ear infections, as being about as effective as newer, more expensive antibiotics and causing
　　(B) amoxicillin, long a standard treatment for ear infections, to be about as effective compared to newer, more expensive antibiotics and with
　　(C) amoxicillin, long a standard treatment for ear infections, to be about as effective as newer, more expensive antibiotics and that it causes
　　(D) that amoxicillin, long a standard treatment for ear infections, is about as effective as newer, more expensive antibiotics and causes
　　(E) that amoxicillin, long a standard treatment for ear infections, is about as effective compared to newer, more expensive antibiotics and with
　　原文意思：
　　一个东西可能比更贵的抗生素更有效并且产生的副作用更小。
　　题目分析：
　　原文有一个并列关系，就是更有效和副作用更少这两个形成并列，A 用 being 和 causeing并列，凑合，先留着。B 前面是 to be 后面是 with 引导的介词短语，不好，干掉。C 前面是to be 而后面是 that 引导的从句，不合适，干掉。D 前面用 is 后面用 causes 形成了对应，留着。E 前面用 is 后面用 with 这个介词短语，显然不对应，干掉。A 和 D 进行比较，还是感觉 D 加了 that 前后意思分辨的更清楚，如果不加从哪里是 found 的内容，需要琢磨，加了 that，这个词汇之后所说的显然就是 found 的内容，D 更清楚一些！

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