2、根据短文内容在空格处填入一个适当的单词，使短文的意思完整，需填单词的第一个字母已经给出。

　　 It is well-known that man is much cleverer than any animal. But which is the cleverest a_______(1) the animals？ Some scientists t_______(2) it should be Alex， an African grey parrot. He is unlike any other animal. He can really t_______(3) with people！

　　 When he says “come here”， he really w_______(4) someone to come up to him.“

　　 “Alex is as clever as a c_______(5) of 2 or 3 years old，” says Dr. Pepperberg. “He does not just repeat the s_______(6) he has been taught. He u_______(7) the words！”

　　 Alex can tell about 50 d_______(8) things， name 7 colours and count from 1 to 6. Is the parrot actually thinking in the w_______ (9) how man does？ Nobody can say. But the q_______ (10) is very interesting.

　　 答案与解析

　　 本文论述了非洲灰色鹦鹉被一些科学家认为是最聪明的动物。

15. on.跳舞当然是在草地上，所以用on.

14. in.表示在树上一般用介词in.注意表示在树上结的果子时又一般在on了。

13. cheaper.与形容词pleasanter并列的也一定是形容词，且为比较级，在方框中选出cheap和beautiful，根据常识应是cheaper.

12. but.前后是转折关系用but.

11. had.与party搭配用have，因为是去年，所以用一般过去时had.

10. more.由后文跳饿了，自然就会吃得更多。

9. until.表示某种动用一直延续到某个时候用until.

8. beautiful.摆放的是最好的东西，房间看起来自然就是美的。

7. put.首先应判断用动词，又从后面的the best plates and glasses等可知应是已经“摆放”出来，所以用put的过去分词put.