A noticeable [процент, доля] of prima partas are now over 30.

Hint: A technical term for a woman having her first child.

percentage

Dr. Smythe was invited to be the [rдиректором] of Clemsdale High School in north Philadelphia.

Hint: The BrE word is normally ‘headmaster’

principal headmaster head

My sister’s been going through some [этап] or other ever since she was a teenager!

phase

Info: Words of Greek origin often have spellings in ph, th, ch, rh and so on.

Our jeep pulled up in a dusty, run-down military [городок] on the edge of the city.

Hint: A more specific word than “area” is needed!

compound base

Recalcitrant prisoners were often placed in [изоляционные (изоляторы)] cells for a month or more.

isolation

Info: ”Solitary” is not normally used with “cells”, but is ok in “solitary confinement”.