帮我解析一些这些英语选择题!1.The Oriental Pearl TV Tower( )tens of thousa

帮我解析一些这些英语选择题!
1.The Oriental Pearl TV Tower( )tens of thousands of visitors since 1995.
A.attracted B.attracts C.has attracted
2.What do you think of the bridge?
I have never seen ( )before.
A.such long one B.so long one C.such a long one
3.Many spectators came to Shanghai to ( )the 48th World Table Tennis Championships.
A.see B.look C.watch
4.Excuse me,please look at the sign "No Smoking"
Sorry,I( )
A.don't notice it B.am not noticed C.did't notice ti
5.My uncle went to Australia last year.We haven't seen him( ).
A.since almost a year ago B.from almosta year on C.after almost a year
学习主要是一个过程,一个求知的过程,我需要理解为什么这么选择.