1 . He ________ have finished writing the paper. He hadn’t written a single word when I left him fifty minutes ago. (用适当的词填空)

2 . You ________ have seen Mary at the meeting this morning, because she left for Beijing yesterday. (用适当的词填空)

3 . With the loss of blood, he couldn’t __________ (survive) for very long after being shot. (所给词的适当形式填空)

4 . I didn’t see her in the meeting room this morning. She __________ not have spoken at the meeting. (用适当的词填空)

5 . Your eyes are so red. You can’t ________ (sleep) well last night. (所给词的适当形式填空)

6 . George__________ have gone too far. His coffee is still warm. (用适当的词填空)

7 . I couldn’t________________(enjoy) myself more—it was a perfect day. (所给词的适当形式填空)

8 . — Do you know where David is? I couldn't find him anywhere.
— He ________ have gone far - his coat's still here. （用适当的词填空）

9 . George ________ (not go) too far. His coffee is still warm. (所给词的适当形式填空)

10 . I didn’t see her in the meeting room this morning. She couldn’t _________ (speak) at the meeting.