1．Every now and then, pictures of sweet moments floated into their minds with sweetness and bitterness, which made them smile and then choke(哽咽) up to tears.
2．To wear a scarf gracefully, first fold the scarf narrowly and then wrap(包裹) it around the neck with the ends hanging in front.
3．One major loss caused by the delay(推迟) of the 2020 Olympic Games in Tokyo is tourism, which is an important part of the Japanese economy.
4．Tom became frightened at the sound of explosion and his wife also got into a(n) panic(恐慌)．
5．Since I did not have any experience, I studied carefully and learned some basic operation techniques(技能) so that I can use the software on my own.
6．It is a disturbing news that people in big cities are falling victim(受害者) to air pollution.
