—Hurry up! The train _____!—I’m sorry I didn’t know.
______the heavy rain, we ______the town.
The two strangers have been talking in the park for a long time as though they ______old friends.
—The concert was wonderful! —Really? How I wish I ______to the theatre with you yesterday!
—I didn’t know you were good friends . —You_____.I have known her since she moved here. You were studying abroad then.
— Mum, it’s none of my business. Why _____ I care? — Just because she is your sister.