最后请教几道高中英语语法题,说明理由?5,__A______used to be my wish to get further education in______Great Britain.A,It,\ B,There,the C,It,the D,There,\6,__D__in history when remarkable progress was made in

最后请教几道高中英语语法题,说明理由?
5,__A______used to be my wish to get further education in______Great Britain.
A,It,\ B,There,the C,It,the D,There,\
6,__D__in history when remarkable progress was made in raletively short periods of time.
A,There has time B,It has time C,It is time D,There has been time

it 做形式主语,代替后边的不定式
there be 句型的完成时,曾经有过这样的时候