The island is ____ attractive in spring and autumn because of the pleasant weather in both seasons.
--- Where have you been?--- I got caught in traffic; I could have been here a little earlier.
If it yesterday, we could play football on the sports ground now.
--- Would you have called her up had it been possible?--- Yes, but I busy doing my homework
Jane would never have gone to the party that Mary would come to see her.
Without electricity, human life quite different today.