发生下壁心肌梗死时出现V1导联R波增高，最可能的原因为（）

A.右束支阻滞

B.右心室肥厚

C.正常变异

D.后壁心肌梗死

E.预激综合征

It was in New Zealand____ Elizabeth first met Mr smith.[ ]

A. that

B. how

C. which

D. when