单选题
33.
Ever since we started negotiating with him, it's been hard to tell when he's being honest and when he's ______.
A、
bluffing
B、
bluffs
C、
has bluffed
D、
bluffed
【正确答案】
A
【答案解析】
选项A正确，bluffing是现在分词，意思是“吓唬，愚弄”。选项B、C和D都不是现在分词。
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