-Was the United State of America founded on July 4th, 1776？ --You _________  be right but I need to check it in the history textbook anyway.

You should _____ some English every day. It’s good for your vocabulary.

—Can you tell me what to wear at the party?—If I            you, I            the blue jeans.

Those who failed to get into the art exhibition ________ disappointed as many of the artists who should have appeared did not come. 

I          use a clock to wake me up because at six o'clock each morning the train comes by my house.