Dear Sir,
I am university student．I once thought life at the 76．_________
university must be excellent, but now I had changed my mind． 77．_________
I have three roommates, and I was the last one to move 78．_________
into the dormitory．Last term, I got along peacefully and 79．_________
happy．But I find they are not willing to be with me now． 80．_________
They don’t talk with me, so they’ve become cold toward 81．_________
me．Many time, I have wanted to talk with them about what 82．_________
I felt like, but I failed to find an opening．When leaving 83．_________
alone, I am always recall this sadness．Why can’t I win true 84．_________
friendship? I’m lonely, and look forward to get your advice soon． 85．_________
Yours,
Peter
76．am后加a。
77．had→have。
78．√
79．I →we
80．happy→happily
81．so→and。
82．time→times
83．leaving→left
84．去掉am。
85．get→getting。
76．am后加a。冠词的错误。单数可数名词前一定要有冠词；表示非定指加a。
77．had→have。时态的错误。这里应该用现在完成时表示延续到现在的动作。
78．√
79．I →we代词的错误。语境表示作者和室友相处很好，用we。
80．happy→happily词类的错误。用副词而不是形容词作状语。
81．so→and。连词的错误。用并列连词表示陈述多个事实。
82．time→times短语的错误。这里表示“几次”，用many times。
83．leaving→left非谓语动词的错误。语境表示被独自一人撇在一边时，用过去分词做状语。
84．去掉am。句式的错误。这里有动词recall(回忆)，前面的be动词是多余的。
85．get→getting。非谓语动词的错误。look forward to接动名词或名词、代词等做宾语。