The man over there is our English teacher Over there
which man is your english teacher?
I think context is:
”Who is your English teacher? "
”The English teacher over there. "
-Hi,Sam,is that man our new teacher?-No,it____ be Mr Wang.
A.might B.can't C.mustn't D.must
B
Must keep with no, so choose negative. But mustn't means forbid
That man is our Chinese teacher Tom is very tall
She is my mother
Yes,she is.
Who is that man?
Who is your mother?