来自靳肖闪的问题
---TheremustbeadozenpensinthishousebutIcanneverfindonewhenIneedthem.---Keeplooking.____issuretoturnup.A.OneB.ItC.ThatD.ThisB怎么不对?
---TheremustbeadozenpensinthishousebutIcanneverfindonewhenIneedthem.
---Keeplooking.____issuretoturnup.
A.One
B.It
C.That
D.This
B怎么不对?
