Question

Who is that man ? -- ______must be our headmaster

( )9. -- Who is that man ? -- ______ must be our headmaster . A. He B. I

Answer 1

选A.He.
Who is that man?
He must be our headmaster.
意思是:那个男士是谁？
他一定是我们的班主任。

而不能说，I must be our headmaster.我一定是我们的班主任。不符合逻辑。