--Have you known each other for long?--Not very long,_____we started to work in this company.A.sinceB.beforeC.whenD.after
热心网友
：--Have you known each other for long? --Not very long,_____we started to work in this company. A.since B.before C.when D.after该句是省略回答，将所省略部分补出，答案就容易看出是考现在完成时和段时间连用：It's not very long,(we have just known each other)since we started to work in this company.所以选a,即从在这家公司工作到现在，b,c,d,选项没有这种用法。
热心网友
选a since 自从。。。