1. (2022·恩施) 仔细阅读下面五个句子，然后用方框中所给的单词或短语填空，使每个句子在结构、句义和逻辑上正确。（提示：选项中有一个是多余的。）

A. keep in touch with    B. a symbol of    C. couldn't help jumping D. be confident about   E. for the better   F. unfortunately

1. （1） No matter what happens, we should ourselves.
3. （2） With the help of his teacher, his English has changed .
5. （3） The boy as soon as the host announced he was the winner.
7. （4） Bing Dwen Dwen is the 2022 Beijing Winter Olympics.
9. （5） Nowadays, people of all ages their relatives and friends by Wechat.