33. There's no light on - they______ be at home.
35.Fortunately we had a compass, without________we would have got lost.
34.Terrible as the storm was, umbrellas tightly__________in our hands , we continued our way.
33.— Is it all right if I come at about 8.30 ? — No, I ________ the football match then.
32.He was very busy, and________he didn’t go to the party that night.
31.America was_________was first called “India” by Columbus.