重點講解：
1. fall on
落到；落在……上面；
eg. A mass of snow and rock break away and fall on the climber.
一堆積雪和巖石突然崩落到登山者的身上。
eg. Everybody took cover when the bombs began to fall on the town.
轟炸時，鎮上的每個人都藏了起來。
2. a chunk of/chunks of
大量；大塊；大部分；
eg. The company owns a chunk of farmland near Gatwick Airport.
該公司擁有蓋特威克機場周邊的大片農田。
eg. They had to be careful of floating chunks of ice.
他們必須當心大塊浮冰。
3. prompt sb. to do sth.
促使；推動；引發某人做某事；
eg. Japan's recession has prompted consumers to cut back on buying cars...
日本經濟的不景氣使得消費者在購買車輛上減少了開支。
eg. His curiosity prompted him to ask questions .
他的好奇心激起他問許多問題。