2  Europe acquired from Australia myxomatosis: a pestilence.

3  French physician introduced it---- estate.

4  It spread．

5  France: rabbit not a pest; sport; food supply.

6  Britain: rabbit: a pest; tame rabbits: fur industry.

7  Could man control his artificial disease?

C  Write a paragraph of about 200 words on one of the following subjects:

1  Pest control.

2  The balance of nature.

Key structures  关键句型

A  Put the words in parentheses in their correct position in these sentences．In many cases, more than one position is possible．Do not refer to the passage until you have finished the exercise:

1  In the early days of the settlement of Australia, enterprising settlers introduced the European rabbit．(unwisely) (11.1-2)

2  It was found that there was a type of mosquito which acted as the carrier of this disease and passed it on to the rabbits．(later) (11.7-8)

3  It spread the disease all over the continent and reduced the rabbit population．(effectively, drastically) (11.9-10)

4  It became apparent that rabbits were developing a degree of resistance to the disease, so that the rabbit population was unlikely to be exterminated．(later, completely) (11.10-11)5  Europe, which had bequeathed the rabbit as a pest to Australia, acquired this man-made disease as a pestilence．(ironically) (11.13-14)

B  Compare these two uses of so that:

1  This rabbit had no natural enemies in the Antipodes, so that it multiplied with that promiscuous abandon characteristic of rabbits．(11.2-3)

2  I went to Switzerland last winter so that I could do some skiing.

Write two sentences using so that in the ways shown above.

C  Note the form of the verbs in italics in this sentence:

So while the rest of the world was trying to get rid of mosquitoes, Australia was encouraging this one．(11.8-9)

Complete the following sentences:

1  While Tom was doing his homework, his sister ______.

2  While my wife was seeing to the evening meal, I ______.

D  Supply the missing words in this sentence．Do not refer to the passage until you have finished the exercise:

It spread through France, ______wild rabbits are not generally regarded as a pest but as a sport and a useful food supply, and it spread to Britain ______wild rabbits are regarded as a pest but ______domesticated rabbits, equally susceptible to the disease, are the basis of a profitable fur industry．(11.15-18)

Special difficulties  难点

A  Study the following pairs of words and then write sentences of your own to bring out the difference.

1  discovered (1.4) ---- invented

Captain Cook discovered Antarctica when he was exploring the Eastern Pacific Ocean.

Do you have any idea who invented the safety pin?