Why does Johnson do yard work？
A. To earn money for school.
B. To keep his family's yard looking nice.
C. To be able to work outdoors.
D. To get exercise while working.
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听力原文：W: What do you think of Tom's paintings？
M: A few years ago, I like them very much, but now he's after fame and fortune. His talent has suffered.
What does the man say about Tom？
A. He has lost many of his paintings.
B. He has become a famous person.
C. His fortune has been good recently.
D. He no longer makes good paintings.
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
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.
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