Mr Williams, ______ of the long speech, sat there, ________ to death.

 _______ never to come back, the boy left his home angrily.

—I wonder why the thinnest plastics bags, though ________ , are still in use here.—Well, it’s no easy job to solve this problem effectively.

It remains ________ whether the students will benefit from the monthly exams.

 I hear they’ve promoted Tom, but he didn’t mention _____ when we talked on the phone.