I don't know____ he is going to the party or not tonight;I'll call him to checkA whether B that C what D which

问题描述:

I don't know____ he is going to the party or not tonight;I'll call him to check
A whether B that C what D which

A

A

whether表示“是否”

祝学习进步O(∩_∩)O

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选A whether 和 后面的 or not 相呼应