that man _____ be the headmaster ,because he always stands here a_英语解答

that man _____ be the headmaster ,because he always stands here at this time.（填适当的情态动词）

人气：468 ℃　时间：2019-08-21 12:54:29

解答

填must.
后面有表示原因的推断.所以这里是肯定.because的原因是最强的.所以是很肯定的推断.