[填空题]Manufacturers must sell cleaner cars.

[填空题]Technologies today can make cars run on cleaner energy such as nuclear energy or wind energy.

[填空题]We must finish the work on time. The work must ______ on time.

[单项选择]

Passage Four
You need a new vacuum cleaner. Several are on display--different prices, different features--but there are no clerks to be found. Finally a guy in a store vest slips past. You begin to ask questions, but he knows even less about vacuum cleaners than you do.
Robert Odom, shopping at the Southcenter Mall near Seattle, finds "it’s harder to get waited on now. Many stores have one person covering a tremendous area. You’ve got to go looking to find a clerk."
Retailing is big business in the United States. Every day, billions of transactions take place in the nation’s 1.4 million stores. Inventive technology speeds a staggering $2.5-trillion-a-year flow of purchases. But why do those bad encounters with salespeople continue to bother us so
When Yankelovich Partners asked 2,500 shoppers what was "most important to you regarding customer service," people ranked courtesy, knowledge ability
A. knowledge
B. politeness
C. friendliness
D. communication

[单项选择]

What was the biggest problem the cleaner’s daughter faced
A. She had a serious heart disease.
B. She would not clean the cars herself.
C. Her father was ill and she had no family in Hong Kong.
D. Her school friends were too poor to help her.