“____ he have left yesterday?” Yes, he ____<br/>yesterday.” No, he ____ yesterday.” A: Must; must have left; can’t have left B: Can; can have<br/>left; can’t have left C: Can; must have left; can’t have left D: May; must<br/>have left; shouldn’t have left

My key was missing , I___ it in the office . A: should have left B: could have left C: must have left D: need have left

Since nobody is answering the phone，they____________． A: should have left B: needn"t have left C: must have left D: can have left

If we ______ earlier, we would not have missed the bus. A: left B: have left C: had left D: would have left

The man （ ）this way, for here are his footprints. A: should have left,should left,must have left,must left

By the end of the year all but two people . A: have left B: will leave C: will be leaving D: will have left E: would have left F: will have

By the time you receive the letter, I ____( )____ for America. A: will leave B: have left C: would have left D: will have left

By the time he ______ to the station, the train _____. A: go; have left B: went; have left C: had come; left D: went; had left

The light in his office has been turned off. He ___________. A: must have left B: must leave C: should have left D: have left

By the time we got back to the office, the clients ______ for the airport already. A: will have left B: were left C: had left D: would have left