1．Little Tom b____________like a gentleman at yesterday’s party.
2．Volunteers serve as ____________ (advocate)for abused children.
3．As many as 30,000 refugees died of hunger and lacking m____________care.
4．The shop assistant didn’t take the customer’s request s____________，as a result，his prize was kept back by the boss.
5．He is now out of work as a result of his c____________，which resulted in a great loss in business.
6．I can’t tell you____________(明确地)when I can finish the project.
7．Copper____________(传导)electricity better than other materials do.
