在思想的条理性、周密性、敏捷性之中，即兴演讲最需要的是思维的敏捷性。
参考答案：对
Most probably it will be another 7 hours _____ you can have next meal, so each of you must have your stomach full.
A．since
B．when
C．after
D．before
教必有法，但无定法，贵在得法
