最后请教几道高中英语语法题,说明理由?
5,__A______usedtobemywishtogetfurthereducationin______GreatBritain.
A,It,B,There,theC,It,theD,There,
6,__D__inhistorywhenremarkableprogresswasmadeinraletivelyshortperiodsoftime.
A,TherehastimeB,IthastimeC,ItistimeD,Therehasbeentime