B. Translate the following underlined sentences into English.
其实，人体就是一个活生生的例子。通常大家都认为细菌是有害的，孰不知人体如果没有了细菌，人是无法存活的。
【正确答案】：
IT IS GENERALLY BELIEVED THAT VIRUSES ARE HARMFUL, BUT SCARCELY DOES IT COME INTO OUR MIND THAT A PERSON CANNOT SURVIVE WITHOUT THEM.
【题目解析】：It is generally believed that viruses are harmful, but scarcely does it come into our mind that a person cannot survive without them.考点：衔接手段连词“but”和代词“them”的使用。It is句型的使用，以及一些短语的使用。scarcely放在句首，后面的句子需要部分倒装，将助动词does提前。一些词组或短语的意思的考查，如：come into one's mind：触念；想起；突然想到。
