词形变化
1．fly(名词)______ 2．skill(形容词)______
3．properly(反义词)______ 4．freedom(形容词)______
5．curious(名词)______ 6．opposite(反义词)______
7．envious(动词)______ 8．prepare(名词)______
永乾教育寒假作业快乐假期延边人民出版社系列答案科目：高中英语 来源：高中课程新学案 高中三年级、英语 题型：022
以下是从本单元课文中摘出的原句。试试看，能填上吗？要注意词形变化！
1．The introduction of foreign species is a global phenomenon which ________ negative ________ ________ the conservation of native species and the integrity of ecosystems, having significant economic consequences．
2．About half of all invasive species are moved ________ ________, such as insects that travel on your muddy shoes when you fly home from a holiday．
3．It took seven years and a great deal of money to finally ________ ________ ________ the invaders．
4．Today, however, lots of people travel long distances every day and this ________ ________ ________ the spread of undesirable species．
5．There are many easy ways in which people can ________ ________．
6．________ ________ ________ ________, inspections in countries such as the US are not as effective．
7．The issue first ________ ________ widespread public attention in 1993．
8．But the legal action was dismissed because of ________ ________ scientific and medical evidence．
9．But a study in Sweden several months ago found that cell phone users ________ two-and-a-half times ________ ________ ________ suffer brain tumors near the ear where the phone was used．
10．Some people have sharply criticized the cell phone industry and government officials for continuing to say the phones appear safe without knowing ________ ________．
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科目：高中英语 来源：高中课程新学案 高中三年级、英语 题型：022
以下是从本单元课文中摘出的原句。试试看，能填上吗？要注意词形变化！
1．Who knows when humans first ________ ________ flying like a bird?
2．________ ________ ________ fast they ran, they could not ________ ________ ________ the land．
3．________ early humans realized it or not, they had one advantage which would eventually ________ them ________ fly：a human brain with unlimited potential．________ humans were not born with wings, they could ________ ________ how to make their own wings．
4．________, many people throughout time have strapped wings to their bodies and jumped from towers or cliffs ________ ________ ________ ________ fly．
5．Leonardo da Vinci ________ ________ ________ ________ think about how a flying machine would actually be built．
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