He won by______.because his opponent refused to play.
A.defect
B.default
C.deficit
D.refusal

A.because
B.
A.defect
B.default
C.deficit
D.refusal

【参考答案】

B
解析：defect缺点，不足之处；default不履行责任，缺席，by default缺席，不到场；defi......

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