单选题
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
【正确答案】
D
【答案解析】
从过去到现在一直发生的动作，并还在继续，用现在完成进行时。选项D是正确的。
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