-- Mum，can I go on a holiday with my classmates this summer vacation?-- OK．You __________ have a chance if you get along well with your studies．

--Honey, stay home before I return. ---I _______, mum. 

He ___________ unwisely, but he was at least trying to do something helpful.

It was my fault. I ________you about the meeting earlier. 

—Is it necessary to look up every new word when I come across it in reading?—No. You ________， because you are likely to guess the meaning from the context.