1. (2018·宁波) 根据下列句子及所给汉语注释，写出空缺处各单词的正确形式（每空一词）。

1. （1） April is the (第四)month of the year.
3. （2） The (努力)you work, the more progress you'll make.
5. （3） There will be a high-speed railway, (在……之间）Ningbo and Zhoushan.
7. （4） The use of new energy cars helps to reduce air (污染）.
9. （5） Drinking too much juice can be (有害的) to people's teeth.
11. （6） I met a friend of （她的）in the street yesterday.
13. （7） I can't hear you  (清楚地）. Please speak a little bit louder.
15. （8） —Who is （敲）at the door?

    —Maybe it's the postman.

17. （9） Liu Chuanjian is considered a (英雄）because he safely landed the damaged plane.
19. （10） Mr. Smith (亲吻）his wife and kids before he goes to work every day.