— What great trouble I have solving this problem now! —_____ my advice, you ________less trouble.
—What should I do with this passage? —__________ the main idea of each paragraph.
We __________ him __________ his winning the first prize.
John is ill and has been __________ by Tom in our team in tomorrow's football match.
She concentrated her energies __________ her test.
My deskmate and Tom are similar __________ each other __________ character.