题目内容
Can trees talk? Yes, not in words. Scientists have reasons to believe that trees do communicate 1. each other.
Not long ago, researchers 2.(learn) some surprising things. First a willow tree 3.(attack) in the woods by caterpillars(毛虫) changed the chemistry of its leaves and made them taste so terrible that they got tired of the leaves 4.(gradual) and stopped eating them. Then even more 5.(astonish), the tree sent out a special smell—a signal causing 6. neighbors to change the chemistry of their own leaves and make them less tasty.
Communication, of course, doesn’t need to be in words. We can talk to each other by smiling, raiding our shoulders and moving our hands. 7. we know is that birds and animals use a whole vocabulary of songs, sounds, and movements. Bees dance their signals. 8.(fly) in certain patterns that tell other bees where 9. (find) nectar(花蜜) for honey. So why shouldn’t trees have 10.(way) of sending messages?
Jack is a clerk of a bookstore. Here is the note from his boss. Ben. Jack has to decide what books to order according to the following note and the descriptions of the books.
Hi Jack,
You must hand in the order list of books to me by the first working day of every month. The rules for choosing books are:
For textbooks:
• August in coming. We must choose all textbooks, without thinking of other rules.
For books which are not textbooks:
• If more than five copies of books were sold last month, choose them. But if there are five copies or more in stock (现货) we do not make an order.
• If the wholesale(批发) prices of the books are higher than $ 75, we do not choose them. And we do not order anything whose retail(零售) price is higher than $ 100.
Ben
The descriptions of the books
Title: Homeland English Publisher(出版社): Homeland Ltd Wholesale prices: $ 110 Retail price: $ 140 Textbook: Yes Copies sold last month: 3 Copies in stock: 2 | Title: How to Become Successful Publisher: Founder Company Ltd Wholesale price: $ 25 Retail price: $ 40 Textbook: No Copies sold last month: 2 Copies in stock: 1 |
Title: Biology at a Glance Publisher: New Times Publishing Ltd Wholesale prices: $ 70 Retail price: $ 95 Textbook: No Copies sold last month: 18 Copies in stock: 3 | Title: Good Health in 20 Days Publisher: Oscar World Ltd Wholesale prices: $ 50 Retail price: $ 66 Textbook: No Copies sold last month: 10 Copies in stock: 20 |
1.Jack must hand in the order list to his boss by ________.
A. the first day of last August
B. the last working day of this month
C. the last day of next August
D. the first working day of each month
2.If Jack wants to buy the books about success he should order them from ________.
A. Homeland Ltd B. Founders Company Ltd
C. Oscar World Ltd D. New Times Publishing Ltd
3.Which book sold best according to the text?
A. Homeland English B. How to Become Successful
C. Biology at a Glance D. Good Health in 20 Days
4.Jack can’t buy Good Health in 20 Days because ________.
A. it is not a school textbook
B. the copies in stock are more than five
C. its wholesale price is too high
D. the copies sold last month are over five