Cardealers also have a tough time in bad economy. Therefore，they have to ________ their businessmodel to overcome the difficulties.

Thanks for _______ me your story.

unhappy when he sold his guitarAfter all,he_____it for a long time

________ his being late again, he lost his job and had to stay at home.[ ]

You must apologize________your sister________being sorude.—No way. It was her fault.