Oh no. A traffic jam. There ______ an accident.
I don't know. Someone _______ a cigarette from a bridge.
I am sure that ________ a tiger.
I am sure he wasn't there . You _______
Perhaps he is busy at the moment. He ________.
We _______ go to Greece this summer, but we haven’t decided yet.
I don’t know why Pat hasn’t arrived yet. She _____ have missed the bus.
It ______ be Diana’s tent. She never goes camping
Greg _____ have reached his destination yet. It’s only 7 p.m.
Ben knew everything about Gothic painting. Definitely, he _______ have studied art history.
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