1 . He was very busy yesterday, o ________ he would have come to the meeting. (根据首字母单词拼写)

2 . I ______ he caught sight of the teacher, he turned around and ran away. (根据首字母单词拼写)

3 . He must be fairly intelligent, o________ he wouldn’t have got into Stanford University. (根据首字母单词拼写)

4 . A___________ that he’s still alive, how old would he be now? (首字母填空)

5 . A________ that we can’t get the necessary equipment for the lab, we’ll have to give up the experiment. (根据首字母单词拼写)

6 . I_______ Hamlet came into her room, his mother began to scold him for what he had done to the king. (根据首字母单词拼写)

7 . The old system was fairly complicated w_______the new system is relatively simple.   (根据首字母单词拼写)