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(接那题目forit.)A,waslaunchedBhaslaunchedCislaunchedDhadbeenlaunchedInthetwoyearssincetheCampaignofLoveforEndangeredAnimals(),tensofthousandsofdollarshasbeencollectsfor

题目详情
(接那题目for it.)A,was launched B has launched C is launched D had been launched
In the two years since the Campaign of Love for Endangered Animals (),tens of thousands of dollars has been collects for
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答案和解析
A since 后的从句一般用一般过去时