Question

The United Nations are evaluating the damage caused in Haiti earthquake, while in Chile the government itself ______ the lead role．

A．is taking

B．was taking

C．took

D．had taken

Answer 1

A

解析试题分析：句意：联合国正在评估在海地地震中造成的损害，而在智利，政府本身正在发挥主导作用。题干中while (conj.)后的从句谓语动词只能是延续性动词,强调主从句的两个动词同时发生，意思是当……的时候；虽然；然而。例如，I was peeling my banana while I was walking so I didn't see the banana skin in front of me. 由此可判断，句子空白处也应该是现在进行时，A正确。
考点: 考查动词时态的用法。