中国大学MOOC: The one who helps pickpockets usually doesnt ______.

The police warned people to be ______ guard against pickpockets during the Christmas rush. A: in B: with C: to D: on

A boy-thief takes Oliver to his home and hideout at that he shares with many other young pickpockets and their eccentric elderly leader, .

Where did the policemen catch two pickpockets? （ ） A: at the third crossing B: in the New building C: at dead-end street D: at the grocery store

Oliver is taken by the people he met on the outskirts of London to ____________. A: watch a game B: watch the pickpockets in action C: meet other people