specialize

We need colleges that specialize

in teaching adults with careers and families.

emphasise / emphasize

I would like to emphasize that we are not living

60 years ago-we are living today.

memorize / memorise

Readingand writing involve a complex code of symbols

that must be memorized and practiced.

flourish

In this Climate Central report,Dr.Susan Prichard explains

how tree-killing bark beetles flourish in warmer temperatures.

fasten

Ordinary safety pins may be safe when closed,

but they sometimes fly open and penetrate the flesh of infants

whose clothing they fasten.

frighten

The other day, Mum and I went to St. James's Hospital,

and they did lots and lots of tests on me,

most of them horrible and frightening.

harden

"The state should treat and rehabilitate them,

not hurt and harden them," wrote the task force.

frown

Why do you frown? Something wrong?

I can't work out this equation.