1、 Both of the drivers were injured in the collision.

(A) hindrance (B)cry (C)crash

2、 Janet’s job as an assistant at the Harvard University observatory was to classify stars according to their spectra.

(A) locate (B)photograph (C)categorize

3、In aerospace programs, helium(氦)is used to chill rocket engines prior to the launch.

(A) cool (B) fuel (C) test

4、Ballet is theatrical entertainment that combines the arts of dancing, stage design, and music.

(A) replaces (B) promotes (C) blends

答案：CCAC

詳解：

Crash

n. 撞碎;墜毀;破產(chǎn);轟隆聲;睡覺

vi. 摔碎;墜落;發(fā)出隆隆聲;(金融企業(yè)等)破產(chǎn)

vt. 打碎;使墜毀、撞壞;擅自闖入

He narrowly escaped in the air crash.

他險些在飛機失事中遇難。

categorize

vt. 分類

This mirrors the way we categorize things in the real world.

這反映了我們在現(xiàn)實世界中分類事物的方法。

cool

adj. 涼爽的;冷靜的;出色的

vt. 使…冷卻;使…平靜下來

vi. 變涼;平息

n. 涼爽;涼爽的空氣

adv. 冷靜地

The cool autumn wind clarified my mind.

涼爽的秋風使我的頭腦清醒過來。

blends

n. 混紡，混紡纖維;混合物(blend的復(fù)數(shù)形式)

vt. 使交融(blend的三單形式);使混合，使混雜

Water does not blend with oil.

水和油不能混合。