单项选择题
Mr. Green drove all the way up to the airport（）the plane had left five minutes before.
A．to find B．found C．only finding D．only to find
单项选择题 I have some difficulty（）some of the words in English.
单项选择题 I（）you that Mary's back yesterday but I forgot all about it.
单项选择题 I have never been to Rome. But that's the city（）
