根据句意，用括号内所给单词的适当形式填空。【小题1】Unluckily(luck), he didn’t catch the last bus back home. He had

根据句意，用括号内所给单词的适当形式填空。
【小题1】Unluckily (luck), he didn’t catch the last bus back home. He had to walk.
【小题2】The cartoon itself (it) was not interesting, but it still attracted (吸引）many kids.
【小题3】None of my classmates can swim farther (far) than I can.
【小题4】Every time you answer a question correctly (correct), you will get a point.
【小题5】Computers were one of the greatest inventions (invent) in the last century.

解析：【小题1】根据 he didn’t catch the last bus back home.可知，应该是不幸的；根据本空的位置放在开头，故用副词Unluckily。【小题2】根据本空的位置，放在主语后面和be动词前面，本空应该是The cartoon的同位语，故应该填itself“它本身”。【小题3】根据than可知，本句是一个比较级，而far的比较级是farther。【小题4】根据本空的位置可知，本空是修饰前面的answer的，故应该用其副词形式correctly。本句的意思是“你每次正确回答一个问题，就能得一分。”【小题5】根据本空的位置应该是名词，另外one of +形容词的最高级+名词复数，表示“最…的之一”是固定用法。所以本题填inventions。

就是这个解释