Even though the workers were not satisfied, they _____ to the boss finally. [ ]

Criticism and self-criticism is necessary _____ it helps us to correct our mistakes

do you improve your listening?—I improve it listening to tapes.

ouring now. Are we still going campingtomorrow—-_____ it is good or bad, we will set off asplanned.

Surely Mr. Peterson ____ have forgotten to buy presents for his beloved family members.