问题
选择题
---- Is Bob still performing?
---- I'm afraid not. He is said________ the stage already as he has become an official.
A．to have left
B．to leave
C．to have been left
D．to be left
答案
答案：A
检查考生对动词不定式的时态和语态的掌握和运用能力。首先leave 当“离开”讲时是不及物动词，没有被动形式；其次，句中的already 表示完成概念。因此选择表示主动兼完成的to have left。