1 . Problems arise when the body’s immune system does not f________ appropriately. (to work in the correct way) (根据英文提示单词拼写)

2 . We should never   ________(作弊) in exams. (根据汉语提示单词拼写)

3 . She ___________(倡议) taking a more long-term view on the upcoming reform. (根据汉语提示单词拼写)

4 . These fish_________(原产于) in North America, so they shouldn’t be set free in our twenty waters. (根据汉语提示单词拼写)

5 . I would a________ it if you paid in cash. （根据首字母单词拼写）

6 . The four countries ________(属于) to the United Kingdom. （根据汉语提示单词拼写）

7 . Unfortunately, many birds didn’t ________ (幸存) the severe winter. （根据汉语提示单词拼写）

8 . With the varied climate, the countries ________(吸引) both winter and summer sports lovers.(根据汉语提示单词拼写)

9 . After the exam, I____________（退离）from people, becoming unusually reserved. (根据汉语提示单词拼写)

10 . When you s______, you let out a deep breath, as a way of expressing feelings such us disappointment or pleasure.