english lessons

Mixed Prepositions Exercise 15

Complete the text below by choosing the correct prepositions, then press "Check" to check your answers.
I could not help laughing the ease with which he explained his process deduction. "When I hear you give your reasons," I remarked, "the thing always appears me to be so ridiculously simple that I could easily do it myself, though each successive instance of your reasoning I am baffled until you explain your process. And yet I believe that my eyes are as good as yours."

"Quite so," he answered, lighting a cigarette, and throwing himself down an armchair. "You see, but you do not observe. The distinction is clear. For example, you have frequently seen the steps which lead up the hall to this room."


"How often?"

"Well, some hundreds times."

"Then how many are there?"

"How many? I don't know."

"Quite so! You have not observed. And yet you have seen. That is just my point. Now, I know that there are seventeen steps, because I have both seen and observed. By-the-way, since you are interested these little problems, and since you are good enough to chronicle one or two of my trifling experiences, you may be interested this." He threw over a sheet of thick, pink-tinted note-paper which had been lying open the table. "It came by the last post," said he. "Read it aloud."

An excerpt from "The Adventures of Sherlock Holmes" by Sir Arthur Conan Doyle
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