为了保持健康，我们最好一周运动至少三次．
To keep healthy， we had better exercise three times a week．
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．