My grandfather _____ smoking, but only smokes when he is free. [ ]

It seems that Jimmy is feeling bad about the exam— He needs to _______. A “C” is not the end of the world.

ook at your pale face; you must have stayed up late last night, _____

How do you find James Cameron’s 3D version of Titanic?—Fantastic! It can’t be _______ and has brought us a wonderful experience.

Due to the widespread ________ of this medical technology, more diseases can be discovered and treated at an early stage.