___is no doubt that the Dallas Mavericks will defeat the Washington Wizards in the next game.

______, but the idea of having to work more than ten hours a day without weekends discouraged me. 

It is impossible for____________ little room.

Why is________ you are so late for the class?

Some people are worrying about the possibility ________ mobile phones could be responsible for a range of illnesses, from rashes(皮疹) to brain tumors．