1. (2020·乐清模拟) 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。

decide    when     wait     excited     it

1. （1） I just couldn't believe my eyes I saw so many different kinds of plants there.
3. （2） Charles can't tell how he is about going to China.
5. （3） Choose widely and be responsible for your and actions.
7. （4） It's believed that the food isn't bad for your health.
9. （5） Try to study and remember information bit by bit instead of until the last minute to study everything at once.