I called you, but nobody answered. Where ________ you?

We hope our country can _______ a way to solve the problem of Diaoyu Island.

Who is the tallest boy?—It ______ be John.. John is of medium height.

Linda, the TV a little bit. I’m trying to read the book named The adventures of Tom Sawyer.

How did you get the MP4, from a shop or by phone? —-________. I always like shopping online.