I didn’t quite follow him because he explained the theory _____that is too abstract for me.
-Where did you get this book?-I picked it up from a second-hand bookshop if you __________ know.
Don't be angry with us. We __________ with you together, but we were busy with our final reports when you called in.
-__________ I turn on the TV for you, Grandpa?-Yes, thanks a lot, my dear. You're so considerate.
With so much money, he __________ worry about a little thing like 5 cents !
I __________ myself more-it was a perfect day.