题目内容
根据所给的首字母写出所缺单词的完整形式
The runners are a ________ the finishing line．
There is a lot of e ________ in this physics lab．
It’s a bad habit to stay up until m ________．
Next week I am going to attend a wedding c ________ of my friend．
The computer was one of the most important i ________ in the 20th century．
