B. Urban residents still rely on food grown in rural areas completely．

C. Urban agriculture has a history as long as cities．

D. Urban agriculture can provide huge income．

9. What does the underlined word "they" in Paragraph 3refer to？________

A. Farmers．

B. City residents．

C. Rurai residents．

D. Companies．

10.What can we learn about Brooklyn Grange in New York City from the text？________

A. It has large farming areas．

B .It can only grow single products．

C. It produces enough food for citizens．

D. It makes use of rooftop space to grow vegetables

11．What may be the best title for the text？________

A. Farms in Cities．

B. Future Food System．

C. Food Grown in Cities．

D. Agriculture of New York City．

Think for a moment about the teachers you have had at school．Which one did you like most? And why? Were the teachers you liked most also the ones who were the best teachers in your opinion? Before you read further, consider for a minute the qualities that make a teacher outstanding（杰出的）．

Some very common answers to this question are that teachers need to love their students, that they need to have an expert knowledge of their subjects, and that they should devote themselves completely to their jobs．All of these ideas are, of course, true to a certain extent（在一定程度上）but they are perhaps a little too simple．

It is impossible for anyone to love everyone he knows, and teachers deal with a very large number of students over the years．On the other hand, teachers should certainly be able to make their students feel that ________ are interested in ________ and pay attention to the