A）根据句意及首字母提示，写出空缺处单词的适当形式。

1．This car is designed by a young e                        ．

2．Oceans cover about three—quarters of the earth's s                           ．

3．Britain is writing a report on Asia for g                        class．

4．There are hundreds of small i                       in the sea，which we can't find in the map．

5．Look，it is so dirty here．Sara，take away the r                       when you go out．

B）根据汉语提示，写出空缺处单词的适当形式。

6．—Who is the m                            （班长）in your class?

    —Tom．

7．Dictionary is a useful t                          （工具）in English learning．

8．We have confidence that we will                          （成功）in the match．

9．We should work together to make our                         （环境）clean．

10．While traveling，all the p                            （乘客）should pay attention to their own things．