Some “healthy” habits, such as shower every day and sitting on the loo, _____ be bad for you.

 The red bike _______be Hu’s. She has a blue bike.

— Li Fan won the first prize in the national physics competition. — I ________ he was the winner.

—The speaker is a tall man with glasses.—Then it         be Mr. Smith, who is short and thin.

My new pen ______. Who ______ have taken it?