78. Only when the teacher explained the way to us a second time _________________ it. (hang)
当老师再次向我解释了这个方法后，我才掌握它。
79 . Be careful! Road accidents __________ happen on such snowy weather . (likely)
当心些！这样的雪天更有可能发生交通事故。
80. It is what you did rather than what you said____________________. (matter)
重要的是你所做的，而不是你所说的。
