34. 【C】The study you have been making ____ the ancient Chinese characters is an instructive job.
A. to B. for C. of D. from
36. 【B】Mr. Hughes lives in ____.
A. 303 Room B. Room 303
C. the room 303 D. the 303 room
37. 【C】The price of that type of color TV has been reduced ____.
A. one 18 percent B. by percent of 18
C. by 18 percent D. by 18 percents
39. 【A】—How old was he then?
—At that time he was just a ____.
A. boy of 12 B. 12-year-old boy
C. 12 years old boy D. 12-years-old boy

43. 【B】—Could you ____ take care of my cat while I’m away?
—Sure. Leave it to me, please
A. perhaps B. possibly C. maybe D. probably
78.【A】 -------You should have told him the date earlier.
-------I_______, but he forgot about it.
A. did B. have C. had D. should have
95. 【A】---- Would you have called her up had it been possible?
---Yes, but I ___ busy doing my homework.
A. was B. were C. had been D. would be

34题：你在中国古代汉字上做的研究是一个能让你获益良多的工作。http://www.etmeet.com/Article/qs/xh/200708/19975.html这里面是所有关于make用法及短语。
36题：这是一种固定说法，像bus 228一样。或者这句话还可以这么说My room number is 303=The numeber of room is 303=I live in No.303 room.
37题：这种彩色电视的价格已经下降了百分之十八。因为percent就已经表示复数所以后面不必再加s，排除D。下降了多少用by,下降到多少用to,因此A也排除了。在表示百分之多少的时候为固定格式—数字+percent.
39题：他那时多大了？那时候他才是个12岁大的男孩。这道题我个人觉得除了D项的形式错了，A、B、C都对。
43题：您能在我不在的时候帮我照看一下我的猫吗？没问题，把它留我这儿吧。maybe 或许,比perhaps普通,但不够庄重; probably 大概,肯定的成分较大,是most likely的意思 perhaps 也许,是也许如此也许不如此的意思,大体和possibly 同义；possibly 或者,常和can may must等情态动词连用,比probably的语气弱得多. 因为这句话包含请求的意思，应尽量说得委婉一些，故选possibly.
78题：你应该早点通知他时间。我确实告诉过他了，但是他忘了。上句中的should have done包含有“应该做而没做”的含义，有埋怨的意思。下句should have首先pass掉，因为语句不通；have和had都是完成时态，表示完成的动作对现在或过去有影响，did表示过去的一个动作。下句是我告诉过他了（他记没记住我不知道）。
95题：先排除D项，因为时态不对；C项也不能选，过去完成进行时表示动作发生在过去并要一直延续下去，所以也不对。B项就更不可能了，I什么时候跟were搭配过啊。因此选A。过去进行时表示介绍过去某一时间正在干什么。