题目内容：
根据以下短文回答题，此题要求改正所给短文中的错误。对标有题号的每一行做出判断：如无错误，在该行右边横线上画一个勾(x／)；如有错误(每行只有一个错误)，则按下列情况改正：此行多一个词：把多余的词用斜线(、)划掉，在该行右边横线上写出该词，并也用斜线划掉。此行缺一个词：在缺词处加一个漏字符号(^)，在该行右边横线上写出该加的词。此行错一个词：在错的词下划一横线，在该行右边横线上写出改正后的词。注意：原行没有错的不要改。 Spring has came to Portland at last. The sky is blue. 76._________
Birds are singing on the trees, flowers are blooming, and 77. __________
everyone are in a good mood. Spring has always been 78. __________
a busy time for college students in Portland. They had 79. __________
to take final examinations and hand out their term papers. 80. __________
Most of students who have been living in the dorms 81. __________
will soon be packing their things to move back to home 82. __________
for summer vacation. Of course, many students will be 83. __________
looking for job during the summer and other students will 84. __________
remain in campus to take courses. 85. __________
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