Where have you been— I ______ in the heavy traffic. OtherwiseI ______ here earlier.

16 Summer Olympic Games will be held in Rio de Janeiro, Brazil, which becomes the first city in South America _________ Olympics.

Thelittleboy________fortheapplesonthetree,butofcoursehewasnottallenough.[ ]

Listen ! Helen is singing in the next room.—It __________ be Helen. She is in Tianjinnow.

They make________a rule not to watch TV during the meal. [ ]