49. I was under the impression that the tickets were sold out a long time ago.
點睛
be under the impression that...意為“認為，覺得”，該種表達不常見，因此是本句的難點。其實它相當于think或者have the feeling that...。如：
I was under the impression that he was kind. 我的印象中他挺善良的。
I'm under the impression that language is complex. 我覺得語言挺復雜的。
I am under the impression that it will rain in the afternoon. 我覺得下午會下雨。
