Have any of your teachers ever been astonished ___ your test results?
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from
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at
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for
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of
To solve this question, the user needs to know the correct preposition that should be used to complete the sentence.
The verb "astonished" is usually followed by the preposition "at". Therefore, the correct option is:
The Answer is: C. at
Explanation: A. "of" is incorrect because astonished is not followed by "of". B. "from" is incorrect because astonished is not followed by "from". C. "at" is correct because astonished is usually followed by "at". D. "for" is incorrect because astonished is not followed by "for".
Astonished conventionally takes the preposition at (or by) to introduce the cause of the surprise, as in astonished at the results. From, for, and of are not idiomatic pairings with this adjective.