A． event B． cause C． correctly D． frightening E． suddenly

Then we heard a （1） 　　sound after a bright flash of lightning．

It started to rain heavily in no time． In order to get some information， Mr． Smith turned on the battery﹣powered radio． The weatherman said that the storm was the（2） 　　of all the problems． It hit a tower at the power station before the first flash of lightning． That was the reason why the lights（3） 　　went out before the rain came． Finally， the lights came back． We cheered loudly． The （4） 　　made it possible for the neighbours to have a chance to be together．