Even if these chemicals are still in experimental stages, they _____ to be a number one hit.

This is the place ______ I met him 10 years ago.

been working hard day and night,which, of course,__ histiredness

Sorry, I have no time left nowCan we discuss the mattersupper?

Viewers will have ____ second chance to seeSaturday’s concert on ____ Channel 4 tonight.