Unit 7d

sth that is added

to sth else

sb who does sth

for pleasure

the area of

buildings in a city between two roads

a line made

by the sharp curved nail of a creature

having a round base with sloping sides and a point at the top

to spread

one of the hard parts in the bodies of the creatures that lived on the Earth millions of years ago

to show

sb who

studies rocks

to employ sb for a short

time to do a particular job