根据句意及首字母写出单词，请注意其正确形式。

Our monitor is polite and helpful and he is our teachers' good h ________．

根据句意及首字母写出单词，请注意其正确形式。

Everybody is here and no one is a ________．

根据句意及首字母写出单词，请注意其正确形式。

Outer space was unknown to m ________ at that time, but things have changed a lot．

根据句意及首字母写出单词，请注意其正确形式。

Who was s ________ to be our host of the show, do you know?

根据句意及首字母写出单词，请注意其正确形式。

The young man loved the sea when he was young and he joined the n ________ last year．

根据句意及首字母写出单词，请注意其正确形式。

Armstrong has been a p ________ since he was young．

根据句意及首字母写出单词，请注意其正确形式。

Be quick!Or we will miss the f ________ to Mexico．

根据句意及首字母写出单词，请注意其正确形式。

－Who i ________ the light bulb?－Edison, the famous i ________．

用所给词的适当形式填空。

－Who was the ________(discover)of the America?

－Columbus was．

用所给词的适当形式填空。

Who do you think is the ________(famous)scientist that has ever lived?