1. 结合语境，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。

1. （1） We all feel it is Jack as well as his wife that is (blame) for their son's bad performance at school.
3. （2） Nothing can prevent me (finish) my work. I'll carry on with it.
5. （3） Sarah, hurry up. I'm afraid you won't have time to get (change) before the party.
7. （4） (expose) to sunlight for too much time will do harm to one's skin.
9. （5） China opened website on the South China Sea, complete with historical maps, articles and research, for some information online is not correct.
11. （6） —You should have thanked her before you left.

    —I meant , but when I was leaving I couldn't find her anywhere.

13. （7） Radium, (discover) in the chemistry lab, gave off a blue light.
15. （8） It refers to something in the past which is directly linked the present time.
17. （9） newspapers and the Internet have in common is that they do more than simply record what happens.
19. （10） The British government has issued a new visa policy allows foreign students to stay six months more after their course ends.