---Can you go shopping with me tomorrow? ---Sorry. I have to _____ my sick mother at home..
—Jim, ________ you answer the last question? -- Sorry, I can’t. It’s too hard.
His father ________ in the factory since he was twenty.
--Be quiet! The children ____________ now. --Oh, sorry.
My brother __________ to Canada to learn English in 2005.
Jim, hurry up, ________ we’ll be late for the concert.