问题描述：
英语引导词问题
____ it is 9 a.m.in Vancouve on the west coast,it is 1:30 p.m.in St John's on the east coast.
A.which B.what C.where D.when
____ it is 9 a.m.in Vancouve on the west coast,it is 1:30 p.m.in St John's on the east coast.
A.which B.what C.where D.when
问题解答：
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