（ ） .Look Mary is over there.–That____ be her.She is in America now A.mustn't
问题描述：
（ ） .Look Mary is over there.–That____ be her.She is in America now A.mustn't
（ ） .Look Mary is over there.–That____ be her.She is in America now
A.mustn't B.can't C.needn't D.must
答
B,can't be表示否定推测,肯定推测是must be,固定用法.由后面说她现在在美国可知她不在这,否定推测