______ Simon ______ Jack know what has happened.

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问题 ______ Simon ______ Jack know what has happened.

选项 A、Both... and...
B、Either... and...
C、Either... or...

答案A

解析 由题干中谓语动词“know”可知主语为复数。没有“either...and...”的结构,所以选项B不能选,选项C“either Simon or Jack”后面谓语动词应为“knows”,只有选项A“both Simon and Jack”为复数含义,故选A。
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