John as well as Jack______just been back from an important meeting.

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问题 John as well as Jack______just been back from an important meeting.

选项 A、have
B、has
C、had
D、must have

答案B

解析 在“A as well as B”结构中,as well as=in addition to,因此句子的谓语应与名词A在人称和数上保持一致而不受as well as的影响。其它类似的结构还有:A together with B;A accompanied by B;one after another;A and not B等。
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