宗炳的《画山水序》是中国第一篇正式的（）美术文献。（）
A.山水画论
B.画论著作
C.山水诗集
D.绘画技法书
参考答案：A
用所给词的适当形式填空。
1. Last Sunday Mum let me (do) some homework at home.
2. I hope (希望) he (be) here in one or two days.
3. There (be) a sports meeting in our school next month.
4. Christmas Day (come) very soon. (不久)
5. The man is a book. He is a (write).
Y染色体短臂上的SRY基因的表达产物，使未分化性腺向睾丸方向发育。
