1. Put the verbs into the past participle.
show → .
own → .
sell → .
volunteer → .
face → .
take → .
meet → .
fund → .
challenge → .
sign → .
cover → .
put → .
find → .
look → .
send → .
draw → .
need → .
make → .
pay → .
hear → .
deal → .
tell → .
account → .
trust → .