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I must have been insane to agree to his idea.
A:reasonable
B:crazy
C:sensible
D:unbelievable
B:crazy
C:sensible
D:unbelievable
参考答案
参考解析
解析：本句意思：我肯定是疯了，居然同意了他的主意。insane意为“疯狂的，十分愚蠢的”，与crazy（疯狂的）意思相近。reasonable合理的，有理的；sensible合理的；unbelievable不可相信的。
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