1 . Your cousin ________ have enjoyed his trip in Jixian County, didn’t he? He looks amazingly different. (用适当的词填空)

2 . It ______ (rain) last night, for the ground is wet.

3 . The ground is rather wet, so it ______(rain) last night. （所给词的适当形式填空）

5 . Since the ground is white. it __________ have snowed last night. (用适当的词填空)

6 . I didn’t hear the phone. I __________ have been asleep. (用适当的词填空)

7 . Harry is feeling uncomfortable. He   ________   (drink) too much at the party last night. (用所给词的适当形式填空)

8 . Something ________ have happened to Mary—She’s been crying all morning. (Possibility) (用适当的词填空)

9 . Look at his sad face! He must ________(hear) of the bad news. (用所给词的适当形式填空)

10 . Look, the ground is white! It must __________(snow) last night. (所给词的适当形式填空)