changeful

work arduously

have passed the examination

family ruined

stumble over(stammer out)

a small price for a good article(cheap and fine)

like a cat on hot bricks(hot under the collar)

an ability to rule the country

ugly(pointed mouth and ape's cheek)

harsh and cruel

meticulous to a tault

Teaching benefits teachers as well as students.

be a survior of a disaster

have had a good reputation for a long time

retire when in high office

argue strongly on just grounds

not yet recover from a fright

rockfirm

with relish

a horse of a different color(quite a different matter,question,or point)