---Icanhardlybelievemyeyes.Isthatyou,Lucy? ---Yes,ithas...

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    B. as   C. since   D. when

【回答】

C

知识点：连词

题型：选择题