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The country's chief exports are coal cars and

2022-08-01 21:49:25 问答库阅读 167 次

问题详情

The country"s chief exports are coal, cars and cotton goods, cars ______ the most important of these.
A．have been
B．are
C．being
D．are being

正确答案：C
解析：此题考查是独立主格结构，正确答案是C。