1 . Even scientists cannot explain this natural ____________ (现象). (根据汉语提示单词拼写)

2 . Sharing with friends helped me bring back my ________ (confident) and fit in with others. （用单词的适当形式填空）

3 . His academic________（perform）has improved so much! (所给词的适当形式填空)

4 . It couldn’t be better if you could offer me some ________ (propose). （所给词的适当形式填空）

5 . We work with ________(志愿者) of all ages and backgrounds. (根据汉语提示单词拼写)

6 . Teachers should treat the students as ______. (个体). （根据汉语提示单词拼写）

7 . The exhibition tomorrow is an ______ (机会) to see her later work. （根据汉语提示单词拼写）

8 . I have actually learned a lot about Mexican food culture by shopping at the local ___________(食品杂货店) in Mexico. （根据汉语提示单词拼写）

9 . “My ___________ (assist), Hahim, will demonstrate the machine in action for you,” said Kalan to the crowd. (所给词的适当形式填空)

10 . The secret to his success is learning from many of his ____________(失败). (根据汉语提示单词拼写)