Read the theory, then complete the gaps (1-5) with the correct

Read the theory, then complete the gaps (1-5) with the correct words derived from the words in brackets.
Forming verbs from nouns or adjectives
We use the prefix en- or the suffix -en to form verbs meaning make from nouns or adjectives: large - enlarge, dark - darken, able - enable, wide - widen
Before installing or replacing a light bulb, 1 ........(sure) that the light switch is turned OFF.
STOP AND TAKE A BREAK. DRIVING WHILE TIRED 2) ........(danger) LIVES!
NEW STUDY SHOWS SMOKING 5 ........(weak) THE HEART
Which text would you see:
in the headlines of a newspaper?
on the back of a products packaging?
on a motorway/busy road?
in the adverts section of a newspaper?