DVDs are most effective ______ the discs are sturdy and the crisp images do not degrade with repeated showings.

A peninsula surrounded by more than 200 islands, Hong K...

单项选择题A peninsula surrounded by more than 200 islands, Hong Kong is one of the most densely ______ urban regions on the planet.

As a result of poor management, Sableline, a company on...

单项选择题As a result of poor management, Sableline, a company once famous the world over for its quality toys, is ______ to close down in two years.

Management has passed a rule prohibiting employees ____...

单项选择题Management has passed a rule prohibiting employees ______ in all indoor places for the sake of everyone's health.