—Why didn't you come to Mike’s birthday party yesterday?---Well, I ____, but I forgot it.
---I’m afraid this question is beyond me. ---______. Tell me what you think. There’s no wrong answer.
He _____ to participate in the school debate, but on second thoughts, he gave up the idea.
Miss Green won’t be available at 9 tomorrow morning, for she ____ a speech at that time.
Sometimes to get out of difficulty, one must change his way of thinking, or simply change his ____ towards a problem.
It’s greatly ______ that Arthur gave back the money he found.