When you are in a very dangerous situation and feel afraid, the body automatically produces a chemical in the blood．

A．自由地

B．自动地

C．精确地

D．细心地

Thus the pollution of air would become less important than that of unemployment．

A．工作

B．生产

C．失业

D．销售

In research reported in the science journal Nature, Kendric and his team showed that sheep…

A．研讨会

B．刊物

C．专题报告

D．展示会

Years ago, the experts warned us that the car-ownership explosion would demand a lot more give-and-take from all road users．

A．爆炸

B．释放

C．迸发

D．激增

He kept very calm and did a very courageous thing

A．精彩的

B．有意义的

C．了不起的

D．勇敢的

People call these strange objects Unidentified Flying Objects(UFO)．

A．没有身份

B．来历不明

C．无从辨认

D．查无实据

After the publication of two most famous papers(论文)，there was not a major university in the world that would not have been glad to have him work for them．

A．公众

B．公布

C．发行

D．发表

One day we may even learn more about the invisible colors around us．

A．看不见的

B．奇异的

C．各种各样的

D．绚丽的

CBS was organized in 1928 when its founder, William Paley asked for ownership of a group of radio station．

A．自己的

B．自主权

C．所有权

D．主动权

We'll ________ that difficulty when we get to it．

A．face

B．chew

C．do

D．overcome