distractors: burst buried struck
sentence: Earthquakes are   common  , and thousands of them happen each day.But most are too weak to feel.During a   big   earthquake, there is often a great noise first.Then the earth   shakes   terribly and many houses   fall   down.Railway tracks break and trains go   off   lines; a great many factories are   [MASK]  ; thousands of deaths are caused, and many more lose homes ...