Ⅰ.根据句意及首字母或汉语提示,填写单词
1.The new discovery is of great s to the a
rea’s economy.
答案:significance
2.He is mentally a ,so he always makes trouble.
答案:abnormal
3.I was never d by difficulties and obstacles.
答案:discouraged
4.His bravery is a .
答案:admirable
5.He is an American by (原籍).
答案:origin
