It’s ten years ----- we met each other last time.A.before B.

选B上次我们见面到现在已经十年了。首先 before （在。。。以前）不行,when（当。。。时）不行。after引导的词组所表示的时间是纯系过去,并不延续到说话时,因此要和一般过去时连用。例如：He went home after school。after 也不行since引导的词组所表示的时间一直延续到说话时为止,因而要与现在完成时连用。例如：He has been there twice since 1982。I have done nothing since six o”clock。选 since