Tom ought to ________ me your secret, but he meant no harm.
A.have toldB.tellC.be tellingD.having told在线课程A
【巧解导析】ought to do用来说现在之事；ought to have done用来说过去之事．根据句中meant可知应用过去时．ought not to have done表示“过去本不必做但实际上却做了”；ought to have done则表示“过去应做而实际却未做”．