问题补充:
单选题Thoughmanyoftheheavysmokershaverealizedtheseriouseffectthatsmokinghas______theirhealth,theycontinuetosmokeinsteadof______.A.for; giving it upB.on; quittingC.to; abandoningD.on; leaving
答案:
B解析考查固定搭配。the serious effect是先行词,that smoking has ______ their health是定语从句,把先行词代入定从,是 smoking has the serious effect____ health,构成have an effect on 结构,所以第一空用on;根据句意:他们继续吸烟而不是戒掉。Quit停止,终止。所以选B。