Nowadays， many foreigners learning Chinese． （对……感兴趣）
are those who make you smile， always open their hearts to you and encourage you to succeed． （friend）
2018Football World Cup is being held in Russia now． It is the Football World Cup． （twenty-one）
The young should learn to make decisions by ． （they）
It's important for everyone to know how to ask for help ． （polite）