Question

Though many of the heavy smokers have realized the serious effect that smoking has ______ their health, they continue to smoke instead of ______.

A．for; giving it up

B．on; quitting

C．to; abandoning

D．on; leaving

Answer 1

B

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。