单项选择题
In order to get rid of the habit of smoking，you must set a date（）you are going to stop.
A.in whichB.on whichC.from whichD.at which
单项选择题 I think the idea which they have given（）pretty good in fact.
单项选择题 Although tigers are（）to people, they are（） now and we should protect them or they will die out.
单项选择题 The drugaddict spent much money on his drug every day，（）he became poorer and poorer.
