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）No matter what happens, we should ________ ourselves.

（2）With the help of his teacher, his English has changed ________.

（3）The boy ________ as soon as the host announced he was the winner.

（4）Bing Dwen Dwen is ________ the 2022 Beijing Winter Olympics.

（5）Nowadays, people of all ages ________ their relatives and friends by Wechat.