The primary purpose of the passage is to discuss______.
A. means of assessing the extent of the world food shortage
B. difficulties of applying technological solutions to the problem of food shortages
C. cost of introducing a new good technology into a developing country
D. nature of the new technological innovations in the area of food production
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Which statement best describes "dress-down days" ？
A. On dress-down days, you can wear whatever you like.
B. People's clothes on dress-down days don't receive much attention.
C. We can't judge a person's taste by his clothes on dress-down days.
D. People are usually more careful about what they wear on dress-down days than on other occasions.
Which of the following is true of the ethnic minority families in the U. S. according to the passage？
A. Their cultural patterns ate usually more adaptable.
B. Their cultural concepts are difficult to comprehend.
C. They don't interact with each other so much as White families.
D. They have closer family ties than White families.
A．Early this morning.B．Early this afternoon.C．Before lunch.D．After lunch.
A. Early this morning.
B. Early this afternoon.
C. Before lunch.
D. After lunch.
Man: Could you fill this prescription for me, please？
Woman: I'll take care of it right away.
Question: Where did this conversation most likely take place？
At a drugstore.
B. In a supermarket.
C. At an airport.
D. At a conference room.
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