质数都是奇数，合数都是偶数。[ ]

数列{a_n}中，a₁=1，a_n+1=3a_n+2，则a_n=（    ）。

单词拼写。

1. A friend of m         told me a story about an old scientist,

2. I can't i        what has happened.

3.It is their c        to give thanks to God for the harvest.

4. You should always be t        to your parents for giving you a good education.

5. The children could h       answer those questions which the foreigner asked.

6. She w          what they had to be thankful for.

7. The children looked f       to going on a picnic for a long time.

8. Every student must h        in their homework after they get to school.

9. We want to r        our children to be decent (正派的) men and women.

10. My sister is w         in swimming,so she has to practice it.

11. Mr Smith was fairly b         himself with joy.

12. We said things would turn out well,and sure e       they did.

促进胃肠动力药是（）

A.硫糖铝

B.西沙必利

C.雷尼替丁

D.非甾体抗炎药

E.奥美拉唑

李强同学计划办一期题为《大河流域——人类文明摇篮》的板报，以下符合这一选题的有：

① 金字塔的国度                   ② 种姓制度的产生

③ 《汉谟拉比法典》的出现         ④ 奴隶制民主政治的高峰

A．①②③④

B．①③④

C．①②③

D．①②④

民族自治地方的自治机关（）各民族公民有宗教信仰自由。

A、不保障

B、保障