Ⅰ 单句语法填空
1．(2016·河南三门峡二模)When the time came for me to say goodbye to my friends in the village, I wanted to reward the old woman for the trouble I____________(cause) for her. But she refused.
答案：had caused
2．(2016·青岛自主诊断)No physical cause could____________(find). Finally the doctor said to the man, “Unless you tell me what’s on your conscience, I can’ t help you.”
答案：be found
