my favorite teacher is my Math's teacher.He is a middle-aged man with average built and .....(23).his smile is.....(24).He is ....(25)and a master of his subjec

my favorite teacher is my Math's teacher.He is a middle-aged man with average built and .....(23).his smile is.....(24).He is ....(25)and a master of his subject.this is one quality that....(26) all the students.He is much....(27)but not so that students ......(28)not terrified of him.
23.a.height
b.heights
c.high
d.heighten
24.a.please
b.pleasants
c.pleasantly
d.pleasant
25.a.intelligent
b.intelligence
c.intelligible
d.intelligibly
26.a.impresses
b.impression
c.impress
d.impressive
27.a.disciplined
b.discipline
c.disciple
d.disciplinary
28.a.is
b.isn't
c.are
d.aren't