1．选词填空并用适当的形式：10%
accident, believe，rag, decade, develop, surface, explode, float, solid，account, force , spread
1. They thought it was ___________ for them to walk so far in one day.
2. Henry was looked down upon by the waiters, for he was in ________.
3. He has made a great plan of two _______ for his son when he was born,
and then he will be 20 years old.
