[典例] (2019·全国卷Ⅲ)Wednesday, residents (居民) of Rjukan 47.received their very first ray of winter sunshine: A row of reflective boards on a nearby mountainside were put to 48 .
48．A.repair B．risk
C．rest D．use
分析：选D 本题可以利用习惯搭配解题。根据语境可知，冒号后的句子介绍了Rjukan居民是如何收到冬季的第一缕阳光的——附近山坡上的一排反射板被投入使用。put to use是习惯搭配，意为“投入使用”，符合语境。
