The 31th Olympic Games in Rio de Janeiro (里约热内卢) of Brazil in 2016.

Excuse me. Would you mind my using your dictionaryfor a short time —________.

Ben is one of ________ students in our class. He keeps doing sports every day.

He even _______ notices at the supermarket to ask for old bikes.

Some insects ______ the color of their surroundings to protect themselves.