They were once good business partners but suddenly the relationship between them(  )sour.

They were once good business partners but suddenly the relationship between them(  )sour.


A、

looked


B、

turned


C、

appeared


D、

proved


【正确答案】:B
【题目解析】:

本题考查动词辨析。

look:看,看起来。turn:转变。appear:出现。prove:证明,证实。分析语境,之前关系很好,但是...。出现了转折,这里强调转变,所以turned较为合适,故选B。

句意:他们曾经是很好的商业伙伴,但突然之间,他们之间的关系恶化了。


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