1 . Nothing can be more fascinating than a smile, which can produce hope in even _________ situations.

A．immoral

B．heartfelt

C．desperate

D．secure

3 . At last, they were able to feel _________________ (security) about the future. (所给词的适当形式填空)

4 . Parents should make their children feel __________, loved and wanted. (security) (所给词的适当形式填空)

5 . Social media companies must take responsibility for building a ______ (security) network environment. (所给词的适当形式填空)

6 . 单词拼写
1. ________________vt.劝说；说服
2. ________________ adj.遥远的；远处的；疏远的；心不在焉的
3. ________________ adj.安全的；安心的；可靠的；牢固的vt.          获得；拴牢；保护
4. ________________ vt.转换；交换   vt.& vi. (使)改变；转变 n. 开关；转换器；改变
5. _________________n.瞬间；片刻 adj.立即的；速食的；速溶的
6. ________________ n.指令；命令；控制vt.命令；控制
7. ________________vi.& vt.漏；渗漏；透露n.漏洞；裂缝；透露
8. ________________ adj.不断的；重复的；不变的n.常数；常量
9. ________________adj. 可能的；潜在的n.潜力；可能性
10. ________________ adj.可获得的；可购得的；(人)有空的