-Would you have told him the answer had it been possible? -I would have, but I s

—Would you have told him the answer had it been possible?

    —I would have, but I _____ so busy then.

    A. had been          B. were         C. was            　 D. would be

试题答案

C

had it been possible=if it had been possible。but后分句是描述当时的事实，故用一般过去时态。