-I saw Jim and your brother in the park yesterday morning.-they ---- skating there,right?A.practiced B.were practicing C.have practiced D.have been practicing
问题描述：
-I saw Jim and your brother in the park yesterday morning.-they ---- skating there,right?
A.practiced B.were practicing C.have practiced D.have been practicing
答
B啊，看到是一瞬间的事情，所以一定是过去进行时
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答
D 过去进行时对现在没有影响。
答
选B
看见某人在做某事,用现在进行时,因为是昨天,所以用过去进行时.