从方框中选择恰当的短语填入句子中,注意使用其正确形式。
ahead of; | break down; | run out (of); | pick up; | on the edge of; |
6. Amundsen put a Norwegian flag and returned safely to their starting base
______ their planned schedule.
7. He
______ a beautiful vase when he was in Rome.
8. Over the last 20 to 30 years that once-safe theories
______.
9. We all know that South China Tiger is a species that is
______extinction.
10. I’m afraid I’m going to interrupt you there, as time
______.