He________(打电话)to his pen pal when Igot to his house yesterday
问题描述：
He________(打电话)to his pen pal when Igot to his house yesterday
快点吧Orz、、、、Orz。
答
这道题的正确答案是：
was calling
时间状语从句是 j昨天当我到他房子时
所以用过去进行时
昨天我到他房子时,他正给他笔友打电话