My friends_____some foreigners around the ancient church this time yesterday.A)are showing B)were showing C)showed D)had shown

问题描述:

My friends_____some foreigners around the ancient church this time yesterday.
A)are showing B)were showing C)showed D)had shown

My friends_were showing_some foreigners around the ancient church this time yesterday.
A)are showing B)were showing C)showed D)had shown
this time yesterday.要用过去进行时.
我是从事英语的,不明再问.