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.​