题目

There are lots of problems in your hometown，but we're happy to see many of them ________． A．are solving  B．are solved C．have solved  D．are being solved 答案：D　[句意：在你的家乡存在好多问题，但我们很高兴看到问题正在得以解决。此处应用现在完成时的被动语态。]

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