选择：
1.The train is ( ) safe means of transportaion while radio and television are ( )important means of communication.
A.a ;an B.a;\ C .\ ;the D.\;an
2.I’m considering () a teacher after I leave school.Which is considered ( ) a respectable profession.
A.being; to be B.being; being C.to be; to be D.to be ; being
3.Perhaps what most ( ) the successful people from other is that they live on purpose.
A.separates B.divides C.isolates D.prevent
改错:
There is a river near our school.I like reading English… ( )
It is very quiet there.Several weeks before,I went to the river… ( )
I’m sure that after read English aloud for three years… ( )