问题
选择题
President Bush was in Omaha this morning to deliver a speech, but he the city by the time the shooting took place．
A．left
B．had left
C．had been leaving
D．would have left
答案
答案：B
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President Bush was in Omaha this morning to deliver a speech, but he the city by the time the shooting took place．
A．left
B．had left
C．had been leaving
D．would have left
答案：B
