1. By moving the radar beam around slowly in circles, we can _____ the surroundings.

A. explore B. expose C. exploit D. addle

<addle>

addle 混乱的、糊涂的

addle egg 变坏了的蛋

</addle>

<explore>

explore 开发、研究、探索

</explore>

<expose>

expose 暴露

</expose>

<exploit>

exploit 开发、剥削

explode 爆炸

lodestar 北极星

the exploited 被剥削者

</exploit>