核心问题
（1） antibiotics the treatment of human disease are only in that they are
(2) The twins are so much ____ that it is difficult to tell one from the other.
A. similar B. equal C. like D. alike(全国研考)
我看不出上面的试题(1)有什么错误,也看不出为什么试题(2)不能选 C(like)。
词典解答
出题者的意图是: like 一般用作介词, 用作形容词时只能充当前置定语, 而不能充当表语(此时应当用 alike)。各类标准英语考试的考生应牢记英语测试专家们的这一观点。英语教师和英语研究者则应进一步掌握现代英语的实际使用情况。实际上, 用作形容词的 like 也可以充当表语。The American Heritage Dictionary 明确指出: 形容词 like 可以用作 alike: They are as like as two brothers. 请观察类似的例子:
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They're as like as two peas. (Chambers) 他们长得一模一样。
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He and his brother are very like. (Longman Lexicon of Contemporary English) 他和他兄弟长得很像。
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Then there are Hans and Peter, the twins... and they are very like. (Essential English, Book 1, p. 150) 那里有汉斯和彼得，这对孪生兄弟……他们长得很像。