【题目】It's not what we do but what we don't do that makes us tired. In other words, the tasks we don't complete cause the most_____.
A.anxiety
B.worry
C.concern
D.fatigue

【答案】D
【解析】句意：不是我们做什么而是我们不想做什么让我们感到疲倦。换句话说，我们没完成的任务导致了大多数的疲惫。A、anxiety”焦虑“；B、worry”担心“；C、concern”关心“；D、fatigue。”疲惫“。故选D。