【正确答案】 D

【答案解析】patrol此处意为“巡逻队”，如：The commander sent out a patrol to make sure the exact number of nearby enemies．指挥官派出一支巡逻队去弄清附近敌人的确切数目。guard作“警卫，看守”讲，如：There are soldiers on guard at the gate．门口有战士守卫。team则指的是“(比赛)队，工作队，小队”，如：The medical team overcame all the difficulties of the local hospital and stayed in the mountain area for months．医疗队克服了当地医院的种种困难，在山区一呆就是几个月。route意为“路线，路程，航程”，如：Which route did you take?你走的哪条路线?