He ________ the ladder while ________ on the tree．A.falled down from; reaching for the appleB.fell down; he reached for the appleC.fell off; he reached for the appleD.fell off; reaching the apple
网友回答
C解析本题考查“从……跌下”和“伸手去够”两个短语，表达第一空的含义应用fall off，后一空的选词应为reach for来表示够的动作，而D项则表示“够到”。