SAT I 每日一问：2013年7月24日
Writing > Identifying Sentence Errors
The following sentence contains either a single error or no error at all. If the sentence contains an error, select the one underlined part that must be changed to make the sentence correct. If the sentence contains no error, select choice E.
（A）Whereas the caterpillars of most butterflies （B）are harmless, moth caterpillars cause （C）an enormous amount of damage （D）on plants, forest and shade trees, clothing, and household goods. （E）No error (A) (B) (C) (D) (E)
The Correct answer is D. Explanation
The error in this sentence occurs at (D), where there is an improper idiom. Caterpillars (or anything else) can cause damage to something, but they cannot cause damage on something.
