--Ms Wang looks a rather kind lady.
问题描述：
--Ms Wang looks a rather kind lady.
--But in fact she is cold and hard on us,you __believe it!
A.mustn't B.needn't C.shouldn't D.wouldn't
选A
句中it指代Ms Wang 还是 in fact she is cold and hard on us
那为什么用mustn't,我觉得wouldn't意思更好
答
指代Ms Wang looks a rather kind lady.
-Ms Wang 看上去是一个和善的小姐
－但是实际上她对待我们冷淡、苛刻,你不能相信它（她和善的表象）