Ⅰ．根据括号内的要求，写出单词的正确形式

1．famous(最高级)________

2．brave(名词)________

3．adventurous(名词)________

4．discover(名词)________

5．curious(名词)________

6．tomb(复数)________

7．jewel(复数)________

8．contain(同义词)________

9．enter(名词)________

10．eat(过去式)________

11．die(名词)________

12．punish(名词)________

13．science(形容词)________

14．explanation(动词)________

15．virus(复数)________

16．breathe(名词)________

17．arrive(名词)________

18．dusty(名词)________

19．express(名词)________

20．compare(名词)________

Ⅱ．用上题所给单词的适当形式完成句子

1．The letter wasn’t addressed to me but I opened it out of ________．

2．Researchers in this field have made some important new ________．

3．She suffered from a ________ infection．

4．Words cannot ________ how pleased I am．

5．He took a very ________ approach to management．

6．Two children were burnt to ________ in the big fire．

7．Four American students are ________ notes on famous people．

8．By the time I ________ on the scene, it was all over．

9．She recited the whole poem in one ________．

10．The second half of the game was dull in ________ with the first．

11．A cloud of ________ rose as the truck drove off．

12．Knock before you ________．

13．I wasn’t ________ enough to tell her what I thought of her．

14．For the more ________ tourists, there are trips into the mountains with a local guide．

15．He was ________ for refusing to answer their questions．