Spring is coming,and it is time for those about to graduate

Spring is coming,and it is time for those about to graduate to look for jobs.Competiton is tough,so job seekers must carefully consider their personal choices.Whatever we are wearing,our family and friends may accept us,but the workplace may not.
A high school newspaper editor said it is unfair for companies to discourage visible tattoos(纹身) nose rings,or certain dress styles.It is true you can’t judge a book by its cover,yet people do “cover” themseleves in order to convey(传递) certain mssages.What we wear,including tattoos and nose rings,is an expression of who we are.Just as people convey messages about themseleves with their appearances,so do companies.Dress standards exist in the business world for a number of reasons,but the main concern is often about what customers accept.
Others may say how to dress is a matter of personal freedom,but for busiesses it is more about whether to make or lose money.Most employers do care about the personal appearances of their employees（雇员）,because those people represent the companies to their customers.
As a hiring manager I am paid to choose the people who would make the best impression on our customers.There are plenty of well-qualified candidates,so it is not wrong to reject someone who might disappoint my customers.Even thongh I am open-minded,I can’t expect all our customers are.
There is nobody to blame but yourself if your set of choices does not match that of your preferred employer.No company should have to change to satisfy a candidate simply because he or she is unwilling to respect its standards,as long as its standards are legal.
What can be inferred from the text?
A.Candidates have to wear what companies prefer for an interview.
B.What to wear is not a matter of personal choice for companies.
C.Companies sometimes have to change to respect their candidates.
D.Hiring managers make the best impression on their candidates.
为什么选B呢?
Bob would have helped us yesterday,but he——
A.was busy C.had been busy
为什么选A?

/>题是细节推断.注意,细节推断题一般是来自于特殊语言点,你要仔细看第二段的最后一句：Dress standards exist in the business world for a number of reasons,but the main concern is often about what customers accept.即商业公司的着装标准主要是看顾客的感受.还有第三段的首句,Others may say how to dress is a matter of personal freedom,but for busiesses it is more about whether to make or lose money.别的人可能会说穿衣问题是个人自由问题,但对公司来说,这更是一个关系到赚钱还是赔钱的问题.也对个人选择进行了否定.
所以B,穿什么衣服对公司来说就决不是可以由个人来选择的.总结：细节题要着重注意文章中的转折,因果或比较句.此题就是考的转折部分.二段末句的转折,以及三段首句的转折.

如果是虚拟,C就该是if he had't been busy. but后面叙述的是事实,而事实就是他忙,而且是昨天.所以时态与事实双考虑,就选A而非C.