prefer to=like better than
what about=how about
why not=why dont you
how do you like =what do you think
is among the longest rivers=is one of the longest rivers
too to=so that not
said nothing=didn't say anything
spend some time donging(on )sth=take some time to do sth
take care of=look after
can=be able to
at last=in the end=finally
is as big as=is the same size as
wanna=want to
gonna=going to
打得好辛苦，这些都是常用的吧，我只知道这些，都是我卷子上的