6.
It's hard to get a firm decision out of him—he's always going off at a ______.
A、
tangent
B、
tangency
C、
tangible
D、
tangle
【正确答案】
A
【答案解析】
短语go off at a tangent(说话时)突然改变思想，tangency接触/相切，tangible可触摸的，tangle混乱
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