题目

I would have attended your birthday party last night but for the fact that it at that time. A . was raining B . had been raining C . had rained D . would rain 答案：A2．某工厂近8年来产品总量C与时间t（年）的关系如图所示，则下列说法中正确的序号是②③．①前3年中，产品的生产量越来越多；②前3年中，产品的生产量越来越少；③后3年中，停止生产这种产品；④后3年中，年产量保持不变．