证券投资是指投资者购买（），以获取红利、利息及资本利得的投资行为和投资过程。
A.股票
B.债券
C.基金
D.金融衍生品
参考答案：A, B, C, D
用所给单词的适当形式填空。
1. Have you _____ (study) any other languages in school?
2. Thanks very much for _____ (invite) us to have dinner.
3. The wonderful piece of music is so difficult _____ (play).
4. Who was _____ (happy), you or your friend Jim?
5. You need _____ (make) a new sentence.
6. He lives on the _____ (twelve) floor.
7. _____ (not write) the letter in English.
建设法治国家的思想基础是（）。
A.人民群众守法
B.人民群众懂法
C.人民群众信仰法治
D.人民群众知法
