由坐庄题演变出来的防守问答

题目来源：《Test your play as declarer, volume 1》

6C by south. You, west, holds:
T87xx
AJ9
QJTx
x

Leading diamond Q, you see the dummy:
x
8xx
A9x
KJTxxx

The play went:
---1st round：diamond Q, diamond A, diamond 8, diamond 3
---2nd round: heart 2, heart 7, heart K, ?

Question: 1) what do you play now, win or duck? 2) If you win with heart A, what do you play next?

Take your time~~~