单项选择题

Questions 5-7 are based on the following coversation. What does the woman have to do on Saturday morning

A．Walk the dog.
B．Clean the house.
C．Visit a scientist.
D．Do some sewing.
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[听力原文]Frantic grain dealers shouted sell orders at Midwest commodities exchanges Wednesday when the government lifted a two-day trading freeze. But no one was buying and prices plunged. Brokers had expected prices to fall due to President Carter’ s embargo on the sale of 17 million metric tons of grain and soybeans ordered by Russia, in retaliation for Soviet military intervention in Afghanistan, but not as sharply as they did at exchanges in Chicago, Minneapolis and Kansas City, Mo. Less than half a minute into the trading session, prices for wheat, com and soybeans dropped by the daily limit the exchanges permit before halting trading in those commodities. The decline may hurt many farmers who have held crops off the market, hoping to get more for their grain, but it is unclear how consumers will be affected.
单项选择题
Reebok once had to limit the number of its distributors because______.
A．its supply of products fell short of demand
B．too many distributors would cut into its profits
C．the reduction of distributors could increase its service
D．it wanted to enhance consumer confidence in its products
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