1 we are living in an age------many things are done on compu

1 we are living in an age______many things are done on computer.A which B that C whose D when 2 the house,_______ was destroyed in the terrible fire,has been repaired.A the roof of which B which roof C its roof D the roof3 the matter ______ you were arguing about last night has been settled.A that B what C why D for which4 who ____ has common sense will do such a thing?A which B who C whom D that5 he often helps the students _____ he thinks are not quick at their studies.A whom B who C when D because6 Don't talk about such thing of _____ you are not sure.A which B what C as D those7 the freezing point is the temperature _____ water changes into ice .A at which B on that C in which D of what8 i'll tell you ____ he told me last week .A all which B that C all that D which9 who can think of a situation _____ this idiom can be used?A which B that C where D in that10 i like the second football match _____was held last week.A which B who C that D不填（请每道题目给出分析过程）另外,请指教在定语从句中,of which ,for which ,to which ,at which ,on that ,all which ,all that .等都是怎么用的.