2  disease (1.5) ---- decease

Poverty and disease usually go together.

A national crisis was caused by the sudden decease of the President.

3  basis (1.18) ---- base

What's your basis for making such a decision?

The base of the memorial is engraved with the names of those who died．

4  apparent (1.10) ---- obvious

It soon became apparent that our opponents were too strong for us.

It was obvious to the parents that Tom was lying.

5  acquired (1.13) ---- obtained

He has acquired a fearsome reputation.

Further information can be obtained from the information centre.

6  degree (1.10) ---- rank

To a certain degree, I accept the truth of what you say, even if I disagree with your conclusions．(degree = extent) The campaign to protect the countryside involves people from all degrees of society, not just the landowning classes．(degree = social class)

What rank was your father when he was in the army? (rank = an official position on a scale)

B  Note the use of early in this phrase: in the early days (1.1)．Write sentences using the following phrases:in the early hours; in the early years; at an early age.

C  Write sentences to illustrate the use of the following verbs: overrun (l.3); overtake; overdo; overlook.

D  Compare the use of spread in these two sentences:

1  It (the mosquito) effectively spread the disease all over the continent．(1.9)

2  It (the disease) spread through France．(11.15-16)

Write two sentences to illustrate these uses of spread．

E  Note the spelling of this word: manageable (1.12)．Add -able to the following words, retaining or dropping the e where necessary: move; love; peace; knowledge; change; service; believe.

F  Note the use of own in this phrase: on his own estate (1.14)．Write sentences using the following phrases:my own; on my own; of my own.

Multiple choice questions  多项选择题

Choose the correct answers to the following questions.

Comprehension  理解

1  One of the reasons rabbits multiplied so rapidly in Australia is that they ______.

a．were unwisely introduced by enterprising settlers

b．breed rapidly

c．overran the continent

d．overcame their natural enemies in the Antipodes

2  Scientists found ______ of spreading myxomatosis.

a．one way

b．two ways

c．three ways

d．a large number of ways

3  The disease was spread right across the continent of Australia largely because ______.

a．of the mosquito

b．of the rabbit

c．scientists let infected animals loose in burrows

d．Australia encouraged diseased rabbits to migrate to other places

4  Myxomatosis, that was a blessing in Australia, proved to be ______in Europe.

a．domesticated

b．a disease

c．profitable

d．a curse

Structure  句型

5  This rabbit had no natural enemies in the Antipodes ______．(1.2)