The young boy found ________ hard to finish the work alone.

My teacher says she’s canceling the class play. I just can’t understand.—______.You were looking forward to it.

As a father, Einstein was just as ______ as any other father in the world.

Is that your best friend Kitty?— No, it _________ be her. She flew to Singapore yesterday.

He will send me a message as soon as he _________ in London.