单项选择题
He thought nobody was around, but he was in fact seen （） into the office building.
A. to steal B. steal C. stole D. stolen
单项选择题 I remember（） him once when I was staying with my aunt.
单项选择题 When should we hand in the homework（）
单项选择题 For a long time after the operation, Linda found（）difficult to fall asleep.
