I was waiting for the school bus but it didn't come, then I ________ it was Sunday．

1. A.
   realize
2. B.
   had realized
3. C.
   realizing
4. D.
   realized

根据句意和提示写出单词的正确形式。

1．The           （普及）of football has risen the worldwide．

2．The government of China has taken many measures to stop               ．（污染）

3．He made           （决心）to learn English well．

4．__ __ is everywhere in the modern world．（ 广告）

5．The young and the old have different            ．（品位）

6．I was waiting for the school bus but it didn't come． Then I r         it was Sunday．

7．Qufu is an e            place because Confucius was born there．

8．We believe s           our team will win the game．

9．It's bad m          to talk with a full mouth．

10．—Which do you p        , swimming or playing basketball？

    —Swimming better．