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.

在抗原抗体分子比例合适时，沉淀形成快而多，而当抗原或抗体极度过剩则无沉淀形成，成为带现象，其中，抗原极度过剩时为（）

A.前带现象

B.后带现象

C.无带现象

D.抗原带现象

E.有带现象