【题目】While we ____ at the Magic Hotel, my dad ____ sea horses for the first time. ( )
A.were staying; saw
B.were staying; was seeing
C.stayed; saw
D.stayed; was seeing
【答案】B
【解析】
句意：当我们____魔法旅店时，我爸爸第一次___海马。while当……时候引导时间状语从句，表示主从句动作同时发生，时态经常都用进行时态，根据所给选项，B选项正确。故选B。
