He won’t want to eat it unless he’s really hungry,in _________ case he’ll eat almost anything.

Nancy reminded me of what I should ________ have forgotten

Class regulations require ____ is the last to leave the Classroom ____ off all the lights. [ ]

Criticism and self-criticism _____necessary _____ it helps us to correct mistakes.

Hello, Betty! Where are you now — I ________ on the Great Wall of China and talking toyou.