单项选择题

The real detective lives in "an unpleasant moral twilight" because ______.

A．he is an expensive public servant
B．he must always behave with absolute legality
C．he is obliged to break the law in order to preserve it
D．he feels himself to be cut off from the rest of the world
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单项选择题
Which of the following statements can be the best title for this passage
A．Reading the Mind of the Market
B．Controlling the Consumers' Preferences
C．Improving the Styles of Advertising
D．Finding Out the Way to Predict
单项选择题
The last sentence of this passage implies that ______.
A．If the experiments' results can be applied to the practice, the customers will be very likely to buy things according to the ads.
B．If the Harvard group can succeed in finishing the research, they will use it in attracting more and more and more and more consumers into the market.
C．The financial supporting corporations such as Coca Cola, General Motors can employ the experiments in their own marketing.
D．The consumers may discover that those ads will always annoy them by jingling out of their heads and cause them headaches.
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