Why do we make mistakes more when we feel tired？ This happens because parts of our brain actually fall asleep when we're awake and tired． （ easy ）
这对年轻人相爱多年，将于下月成婚．
The young couple and will get married next month．
他们试过很多方法，但似乎都没用．
They tried many methods， but of any use．
必须制定更多法规来防范任何可能的危险．
More laws must be made ．
假如你对网课不满意，请发邮件给我们．
Please feel free to send us an email if the online lessons．
凯文有语言天赋，能说五门外语．
Kevin languages and he can speak five foreign languages．