下列每个句子均有一个错误，请找出并改正。（注意：每句只有一个错误。）
小题1: There are a pen and two books on the desk.
小题2:Two third of the people were badly injured during the earthquake.
小题3:At last, the Mekong enters into the South China Sea.
小题4:Amy is the only one of the girls who come from France.
小题5:By the end of last year, we have learnt 3,000 words.
小题6:You won’t find difficult to solve the problems.
小题7:You can borrow so many books as you want.
小题8:Mice ran out of the fields looked for places to hide.
小题9: I prefer to watch TV rather than reading a boring book.
小题10:I’m eighteen years old and I live in small village.