2. 外语
  3. No one could come up with an easy solution to the government’ s predicament—labor ______. which is caused by the wars.

No one could come up with an easy solution to the government’ s predicament—labor ______. which is caused by the wars.

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问题 No one could come up with an easy solution to the government’ s predicament—labor ______. which is caused by the wars.
选项 A、decline
B、vacancy
C、rarity
D、shortage
答案D
解析 derive起源，源于。句意：像猴子、猿和人这样的高级哺乳动物都有头脑，他们都来源于喜欢在树上栖息的祖先。B. progress前进，进展；C．terminate使结束；D．advance推进，促进。
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