1. (2021八下·新昌期中) 用方框中所给单词的适当形式填空，每词仅用一次(每空一词)。

important    develop    exciting    her    sweep

1. （1） I'm surprised by the high speed(速度) of the city's .
3. （2） When you called Sam, he wasthe floor at home.
5. （3） Mary works hard at her studies, and she does her homework by every day.
7. （4） We are when we hear the news that we won't have classes tomorrow.
9. （5） They didn't realize the of the matter until today.