单词拼写。

1. He always fails exams, for he spends little time making enough p ______ for his examinations.

2. Now the girl is in hospital recovering from liver f_______.

3. There were about 300 students from our school a ______the lecture yesterday.

4. He hurried here i_____ he heard the news.

5. Children are often c ______about everything. They will keep asking questions.

6. As far as I know,this scientist has made quite a few important_____(发现)in this field.

7. The company mainly_____(出版)books for children every year.

8. You should give me a clear______(解释)of your conduct.

9. Some of the students had______(体验)hardships before they entered the university.

10. He told me he was much______(羞愧)of having lied to his mother.

澳大利亚是个地广人稀的国家，不仅劳动力价格昂贵，而且很难雇到工人，许多牧场主为此发愁。有个叫德尔的牧场主采用了一种办法，他用电网把自己的牧场圈起来，既安全可靠，又不需要多少牧牛工人。但是，反对者认为这样会造成大量的电力浪费，对牧场主来说增加了开支，对国家的资源也不够节约。 以下哪项如果为真，能够削弱批评者对德尔的指责( )

A．电网在通电10天后就不再耗电，牛群因为有了惩罚性的经验，不会再靠近触碰电网

B．节省人力资源对于国家来说也是一笔很大的财富

C．使用电网对于牛群来说是暴力式的放牧，不符合保护动物的基本理念

D．德尔的这种做法，既可以防止牛走失，也可以防范居心不良的人偷牛