Dr.PeterSpemce,headmasteroftheschool,toldus,“fifthofpupilsheregoontostudyatOxfordandCambridge.”A.不填；AB.不填；TheC.the;TheD.a;A答案是是A,第二个空不是应该用one吗?为什么要用a呢?

Question

Dr.Peter Spemce,_____ headmaster of the school,told us,“ ____ fifth of pupils here go on to study at Oxford and Cambridge.”
A.不填；A B.不填；The C.the;The D.a;A
答案是是A,第二个空不是应该用one吗?为什么要用a呢?

Answer 1

one fifth = a fifth：五分之一