单词拼写。

1. He didn't work hard all the term. So it's o_____ that he can't pass the final examination.

2. The teacher gave no r_____ to Tom's composition, and left the classroom without a word.

3. In order to resist against the earthquake, the s_____ of the building has been red-signed in common.

4. She s_____ on her bedside lamp and tried to read.

5. As we all know Mao Zedong has a strong Hunan a_____ .

6. The male birds have_____ (与众不同的) black and white marks on their heads.

7. In English the spelling of words doesn't always _____(代表) the sound.

8. She is an excellent _____(语言学家) known all over the world.

9. You should do more and try your best to _____(影响)him.

10. I went to the bookstore yesterday and bought a _____ (参考) book.

传统理论认为，人类祖先由于气候变化、树木减少，被迫离开树栖环境，选择在地面上直立行走。一项最新研究则认为，早期人类直立行走源自现今非洲东部和南部崎岖山脉地区，该地形是上新世时期火山喷发和构造板块移动形成的。人类的祖先被岩石地形和峡谷所吸引，这里可提供很好的庇护栖息地，同时有机会诱捕猎物；这种环境要求早期人类具备直立行走和攀登的能力，因此人类祖先最终逐渐进化为两足直立行走。 下列哪项与最新研究的结论相符？

A.气候变化导致早期人类选择直立行走 

B.人类祖先选择直立行走是为了更好适应地形环境 

C.地质条件的变化改变了人类早期祖先的行走方式 

D.人类祖先由于食物匮乏被迫离开最初的生活环境