I think they are dating. They ______ a lot of each other recently.A.had seenB.had been see

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I think they are dating. They ______ a lot of each other recently.

A.had seen

B.had been seeing

C.have seen

D.have been seeing

请帮忙给出正确答案和分析,谢谢!

热搜:关于氨基酸代谢错误的论述是_________。