问题
选择题
—What were you doing when the UFO arrived?— I with my dog on the street.
A．walked
B．was walking
C．is walking
D．have walked
答案
答案：B
考察时态，句意：当这个飞碟到达时，你正在做什么？结合语境可知下文应该用过去进行时回答，故选B
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—What were you doing when the UFO arrived?— I with my dog on the street.
A．walked
B．was walking
C．is walking
D．have walked
答案：B
考察时态，句意：当这个飞碟到达时，你正在做什么？结合语境可知下文应该用过去进行时回答，故选B