Not until I began to work ________ how much time I had wasted.
It’s the ________ in Britain for a bride to throw her flowers to the wedding guests.
The reason_________ he was late for work was_________ he didn’t get up early.
---Shall I pick you up when I go to work tomorrow? ---You are so kind. _________. Thank you very much.
He couldn’t stand the noise made by the factory, so he wrote a letter to the newspaper to _________ about it.
My opinion about the modern education is not similar to _________of the other teachers’.