Question

she shall have to appear _the headmaster

Answer 1

Hii Mate here is your Answer,

She shall have to appear - In front of - the headmaster.

Here a preposition is used to complete the sense.

Answer 2

$\huge\underline\bold\red{Answer :— }$

▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃

She shall have to appear in front of the headmaster.

▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃