1. You shouldn't have run across the road without looking, you would have been knocked down by a car(也许会被车撞到).

　　解析：本题考察虚拟语气。句子是与过去事实相反，因此用would have +过去分词，表虚拟语气。

　　2 .By no means does he regarded himself as an expert(他把自己当成专家),although he knows a lot about the field.

　　解析：本题考察倒装和词组regard sb. as sth.(把…当作…)。介词短语by no means 置于句首，构成部分倒装，因此把助动词does提前。

　　3 .He doesn't appreciate the sacrifice his friends have made for him, however, he takes it for granted(把他们所做的视作理所应当).

　　解析：本题考察词组take sth. for granted (把…当作理所当然)。同时，考生要注意句子后半句前是一个逗号，要加上一个连词and或者加上however。

　　4. Janet told me that she would rather her mother not have interfered with her marriage(不干涉她的婚姻).

　　解析：本题考察would rather have done sth, 表示过去事件，句子中told提示是过去发生的事，因此用would have interfered with。

　　5 .To keep up with the expanding frontiers of scholarship. Edward Wilson found himself always searching for information on the internet (经常上网查信息).

　　解析：本题考察了感官动词find+宾语+现在分词(作宾补)，现在分词表主动。因此这里用searching。