A lot of new technology into schools to make learning more effective these years．( )A．introducedB．has introducedC．was introducedD．is being introduced 题目和参考答案——青夏教育精英家教网—

题目内容

4．A lot of new technology _____ into schools to make learning more effective these years．（　　）

	A．	introduced		B．	has introduced
	C．	was introduced		D．	is being introduced

分析这些年大量的新科技被引进校园，从而让学习更有效．

解答答案：D
题干中these years表达包括现在在内的时间，要用现在时态；introduce与technology之间构成动宾关系，要用被动．故选D．

点评现在进行时表示正在进行的动作或存在的状态．现在进行时表示动作发生的时间是"现在"，动作目前的状态是"正在进行中"当句子涉及确切的计划、明确的意图和为将来安排好的活动时，现在进行时可用于表示将来．

练习册系列答案

10．Do you know anything new about the incident？
A working party to look into the problem．（　　）

	A．	was set up		B．	has been set up
	C．	has been setting up		D．	is setting up

12．Today we'll discuss some cases parents have difficulty in communicating with their kids．（　　）

19．The key _____ success is to choose a right goal，plan your path and then get started．（　　）

9．大雪使学生们无法上学．（prevent）The heavy snow prevented the students （from） going to school．

16．_____________ in the crowd，he deliberately raised his voice and climbed up to the top．（　　）

13．Australia is one of the few countries people drive on the left．（　　）

To many web-building spiders, most of whom are nearly blind, the web is their essential window on the world: their means of communicating, capturing prey（猎物）, meeting mates and protecting themselves. A web-building spider without its web is like a man cast away on an island of solid rock, totally out of touch and destined to starve to death.

So important is the web to an orb-web spider's survival that the animal will continue to construct new webs daily even if it is being starved. For 16 days the starving spider builds completely normal webs. Then, as the animal gets scrawnier（憔悴的）, it constructs a wider-meshed web using fewer strands（线）. Such webs would only trap larger prey, which is more economical from the perspective of a starving spider.

The spider stores energy by recycling web protein. It simply eats its own web each evening and reuses it to produce new silk. In studies with radioactively, labeled materials, it was found that 95 percent of web protein reappears in the next day' web. Most of the energy needed for web-building is used in walking over the strands as they are laid down．

Scientists are impressed by the adaptability of the spider's highly preprogrammed brain, which is larger for its size than the brain of any other invertebrate（无脊推动物）. If web-building is interrupted, or if some of the existing strands are destroyed, the spider simply goes back to see where the web is left off and then finishes building a normal web. One spider will finish building the incomplete web of another.

1.What is probably the best title for the passage?

A. Secrets of Spiders' Adaptability

B. Secrets of the Spiders' Life

C. Importance of Webs to Spiders

D. Spiders' Highly Preprogrammed Brain

2.According to the passage, which of the following statements is TRUE?

A. Web-building spiders will probably die without their webs.

B. One Web-building spider usually conducts one web.

C. Most spiders will stop conducting webs when hungry.

D. Web-building spiders have good eyesight.

3.A spider conducts a wider-meshed web when ________.

A. it is 16 days old

B. it is getting weaker

C. it has fewer wends

D. it hunts for food

4.A spider's ability to finish an incomplete web proves that ________.

A. it reuses its web protein to reproduce new silk

B. it is able to rebuild a destroyed web

C. the incomplete web is much more important

D. it has a highly preprogrammed brain

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