вставьте в пропуски глаголы is/are.
The traffic_very heavy in this street. Be careful at the corner. When the traffic-lights_red, don't cross the street.
The carrots__delicious.
I think this detailed research.
Look out! The stairs_very old.
The police_responsible for these actions.
The knowledge she has got at college_very deep.
The grapes_ripe.​