题目内容
阅读下列句子,寻找适当的词填空。
If I want to keep fit, I'd better read the books about __________.
If I want to know something about the old places, old persons or old things, I can read the books about __________.
If I want to know something about the sun, the moon, the earth or something about the weather, I should read the books about ___________.
If I want to know songs well, I must read the books about ________.
If I want to know something about the lives of the plants, animals, I have to read the books about ________.