4. This dictionary can tell you how to p___ this word.　　　　　 4____

3．Nowadays school students enjoy l____ to pop music.　　　　 3____

2．Computer is one of the most important i____ in this century.　　 2____

根据下列句子及所给汉语注释或首字母，在句子右边的横线上，写出空缺处各单词的正确形式。(每空只写一词)

1．This mornig Betty a ____to her teacher for being late for the lecture. 1____