【题目】I have heard a lot good things about you _______ I came back from abroad.
A.since
B.until
C.before
D.when

【答案】A
【解析】句意：自从你从国外回来，我听到很多关于你的好评。主句是现在完成时，从句是一般过去时所以选since。until“直到……才”；before “在……之前”；when“ 当……时候”，选A。