As the interview rule goes，you can take some time to think through answers you make a reply.
A. after
B. when
C. before
D. since
网友回答
A. after
B. when
(答案→)C. before
D. since
解析：A在…后；B当…时；C在…之前；D自从，因为；句意：作为采访的规则，在你做出回答之前，你可以花点时间仔细思考答应。根据句意说明是在你做出回答之前。故C正确。