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Most volunteers are from universities, _________ it is not uncommon to see middle and primary school students too.

A．though B．however C．since D．even if 

A

解析試題分析：句意：盡管普遍可以看到中學(xué)生和小學(xué)生，但是大多數(shù)志愿者來自于大學(xué)。Though盡管；however不管怎樣；since自從；even if即使，選A。
考點(diǎn)：考查詞義辨析

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