—Icanhardlybelievemyeyes.Isthatyou,Lucy?—Yes.Ithasbeena...

问题详情：

—I can hardly believe my eyes. Is that you, Lucy?

—Yes. It has been almost 20 years ______ we were together.

A. since      B. before       C. after        D. until

【回答】

A

知识点：连词

题型：选择题