Nature of the problem was such as to arouse his interest.
4. Education of little children has been greatly neglected.
Public education must be greatly extended.
5. The exploration（探索）of space has become one of the chief topics of science fiction（科幻小说）.
Space between the table and the wall was just big enough for a small bed.
6. I prefer classical music to pop music.
Film wasn’t very good but I liked music.
7. My favourite subject at school was history.
All students should know something about history of their own country.
8. I cannot judge accuracy of your calculations（计算）.
In mathematics accuracy is essential.
2) 定冠词的主要用法
a) 用于单数名词前，表示“某一类人或物”，以区别于其他人或物。例如：
The tiger is a fierce（凶猛的） animal. （相当于A tiger is a fierce animal.或Tigers are fierce animals.）
In this tribe the woman goes out hunting and the man stays at home to look after the children.