题目

盖灭时需再重盖一次，以避免以后使用时，绝对禁止用。 答案：【1】灯帽打不开【2】嘴吹灭火18、―What do you think of the opening ceremony of 2008 Olympic Games? ―Wonderful. It’s years         I enjoyed myself so much.        A．after                   B．since                   C．before                 D．when