II. 词形变化

science n，科学 scientific adj.科学的 scientist n.科学家 announce v．宣布 announcement n.宣布 announcer n，广播员，告知者 instruct v.．指导，命令 instruction n.指导，指示 instructive adj.有益的，教育性的 enthusiastic adj.热心的，热情的 enthusiasm n.狂热，热心 enthusiast n.热心家，狂热者 valuable adj.有价值的 value n. 价值 value v. 估价, 评价 【练习】根据句子结构，用括号内所提供词的适当形式填空

1) The _________ took a very ________ approach to _________.(science)

2) The ______ make a(n) ________ that all the details should _______ through the broadcast.(announce)

3) It is ______ and easy for the children to read some masterpieces with the _______ at the bottom of each

page.(instruct)

4) "You don't seem very ______ about the idea." "I don't mind," she said, without much ______.(enthusiasm)

5) There is no any criterion to ______ whether it is _______ information. (value)

keys: 1) scientist; scientific; science 2) announcer; announcement; be announced 3) instructive;instructions

4) enthusiastic; enthusiasm 5) value;valuable Ⅲ．重点词汇

1. conclude vi.终结； 结束; 推断； 决定

[典例]

1）The meeting concluded at ten o'clock. 会议于十点钟结束。

2）It is hard to conclude. 这很难断定。

[重点用法]

conclusion n. 结束,结论

make／draw／reach／come to／arrive at a conclusion下结论，得出结论；

bring sth. to a conclusion使...结束；

in conclusion作为结论，最后；

[练习] 汉译英

1） 我们推定蓝队无法按时抵达目的地。

__________________________________________________________________________________________

2） 我们认定他并没有告诉我们实情，也就是他在撒谎。

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Keys:1) We concluded that the blue team could not reach the destination on time. 2) We concluded that he didn't tell us the truth. That is, he was lying.

2. attend v. 1)注意；留意；处理(与to连用)=do with