根据所给的词性写单词。

1．organize(名词)________

2．accurate(副词)________

3．vary(形容词)________

4．require(名词)________

根据句意和提示，完成下列句子。

Mr．Smith told me that the computers ________(已经卖光了)．

根据句意和提示，完成下列句子。

He works very hard at school because he ________(梦想成为)a scientist in the future．

根据句意和提示，完成下列句子。

Upon getting to the hotel, Sam ________(迫不及待地)turn on the TV and watch the football game．

根据句意和提示，完成下列句子。

He is among the scientists who ________(为……作出巨大贡献)the development of our country．

根据句意和提示，完成下列句子。

Coal can ________(被用于)to make electricity．

用动词的适当形式填空。

Was that the first time you ________(be)in touch with him?

用动词的适当形式填空。

When the police ________(arrive), the thief had run away．

用动词的适当形式填空。

He told me that it was his little sister who ________(break)the vase．

用动词的适当形式填空。

Who do you know ________(invent)the first computer?