We______________last night，but we went to the concert instead.

 ——It was the drug，not the disease，that killed the boy.——He would be still alive today if he ________ that drug.

“Must we do it now?” “No, you _____.”

—Jack fell off the ladder yesterday，but he is all right now.—What a lucky dog! He________ himself badly.

 — There's someone outside. Who it be ?— It must be Mary. She promised to come over at 8: 00.