ignoring double-bond stereochemistry, what products would you expect from elimination reactions of the following alkyl halides？ which product will be the major product in each case？

What would happen if a trademark were not properly protected?

A．The products would have to be sold at a higher price.

B．The products would become available to all manufacturers.

C．The factories producing the products would be closed.

D．The trademark would become available to all manufacturers.

听力原文：W: What an accident! If you've been careful, things would not be as they are.

M: What do you mean? It was my fault? If it were, surely I'll take all responsibility for ir.

What does the man mean?

A．He is not to blame.

B．It was his fault.

C．He will accept all responsibility.

D．He will be more careful next time.

听力原文： The portable, paperless e-newspapers would be a huge environmental win, eliminating the need to cut down trees and burn gasoline delivering the traditional folded parcels to readers driveways. Like many technologies, however, e-paper has been slow to take off. In the past year, since Amazon introduced its Kindle electronic reading device, thousands of Americans have experienced the pleasures of e-books — but for most people, e-newspapers arent yet a reality. Millions of us already read paperless newspapers and magazines on the Web, but e-newspapers would offer different benefits for both readers and publishers. For consumers who already spend too many hours staring at PC screens, e-newspapers would offer portability and a simple reading environment, free from e-mail bells ringing or instant messages popping up mid-paragraph. Among publishers, theres real hope readers will pay subscription fees for those benefits, and that advertisers will pay considerably more for ads on e-readers than they do on the Web. For a primitive look at how e-newspapers might work, consider the Kindle. Amazon currently offers 24 newspapers for use on the device. Subscribers pay $5.99 to $14.99 per month, and each issue arrives wirelessly before sunrise. However, e-reader enthusiasts describe reading a newspaper on the Kindle as disappointing. The Kindles black-and-white screen doesnt handle photographs or graphics well, and its e-papers carry no advertising. Instead of offering well-designed pages that entice readers to skim a story they might otherwise skip, todays e-newspapers merely list headlines or tops of articles, which makes it hard to decide whats worth reading. Questions 16 to 18 are based on the passage you have just heard. 16. Which can best describe the benefit of e-newspapers? 17. What can we learn about Kindle? 18. Which is the disappointing feature of reading e-newspapers on the Kindle?16．

A．It offers 24-hour newspaper service.

B．It is only sold on Amazon"s website in the US.

C．It is a portable e-newspaper reading device.

D．It can be rented at $5.99 to $14.99 monthly.

In what circumstances would the beneficiary of a confirmed documentary credit not receive payment?______.

A．Failure of the applicant

B．Failure of the issuing bank

C．Failure to fulfil the credit terms

D．Failure to fulfil the commercial contract