1. (2019·苍南模拟) 用方框中所给单词的适当形式填空。每词仅用一次，每空不限填一词。

while   twenty   remain   noise   smoke

1. （1） The from the next door is too loud. I can't study at all.
3. （2） Mr. Johnson for nearly ten years. He's not in good health now.
5. （3） Mary was writing a letter, the children were playing outside.
7. （4） Computer is one of the most important inventions in the century.
9. （5） Tony is quiet boy. He always silent in class.