2. 外语
  3. Specially trained dogs are being used to__________ the trapped mountain climbers in the Northwest.

Specially trained dogs are being used to__________ the trapped mountain climbers in the Northwest.

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问题 Specially trained dogs are being used to__________ the trapped mountain climbers in the Northwest.
选项 A、watch over
B、keep track of
C、come up with
D、go in for
答案B
解析 受过特殊训练的狗正用于追踪在西北地区被围的登山者。本题是考查动词词组。watch over 意为“照顾，照看，保护”；keep track of意为“掌握……线索，情况，跟上……”；come up with 意为“赶上……，想出来(主意，办法等)”；go in for 意为“参加(考试或比赛)；嗜好，爱好……”。
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大学英语四级

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