20 I don’t think that

　　我们把她送到海滩去吧。我想她不认识路。

　　Let’s send her to the beach。 I don’t think she knows the way。

　　我觉得在网上告诉一个陌生人家庭的事情不安全。

　　I don’t think it is safe for us to tell a stranger of our family online。

　　我向他不会讲俄语，否则它不会用德语在这个会议上发言。

　　I think he can’t speak Russian， or he won’t speak German at the meeting。

21 I would like to /Would you like to…？

　　如果可能的话，你给我买条新的宠物狗好吗？我保证这次一定好好照顾它。

　　Would you like to buy me a new pet dog if possible？ I promise to take good care of it this time。

　　您能帮一下忙吗？

　　Would you like to do me a favor？

　　。我想和朋友们一起过春节。

　　I would like to be with my friends for the Spring Festival。