Fever, cough and headache are the common __________ of catching a cold.

Don’t forget to give my dog some food and change her water, ______

It’s reported that over 1 billionpeople watched the live opening ceremony of______2010 South

Boys and girls usually _____ and play tricks on each other on that day.

Excuse me, Where is the zoo—Sorry, I don’t know. Ask that policeman.He ____ know.