21.  Days going on and on, we can just say, "I have saw it before.

22.  Nevertheless, what I want to lay emphasis on is that whether we should break the boundaries or whether we can break them among groups.

23.  Also all these are based on that you don't have enough time to read English books.

24.  But authorities warn that it should not be relied on to take the place of medical treatment for serious physical illnesses, and it should not be used to explore deep emotional disturbances without professional supervision.

25.  It is not unconsciousness and not sleep, but much like the condition you fall into when you are so absorbed in what you are reading or working on that you fail to hear someone speaking to you.

26.  There isn't room for much more waste, and yet the factories grind on.

27.  I think school dating can be acceptable depend on during which level of education.

28.  The other people have the opposite opinion, for fraud on the internet is quite popular.

29.  They love chatting very much, which makes men puzzled because men don't talk too much and think there aren't many topics to focus on.

30.  What their parents focus on would be how to protect them from starvation.