---Someone’s been here. Who ___ it be? It looks like Helen.---It ___ be Helen.She is ill in hospital.
Your hand is dirty. It needs __________.
He narrowly escaped __________ in a car accident caused by careless driving.
He got well prepared for the job interview, for he couldn't risk __________ the good opportunity.
He particularly enjoyed __________ a trick on the three men.
—Did you enjoy yourself last night?—Yes, it's very nice of you. I appreciated __________ to the party.