I) 1 is, 2 discovered, 3 doesn't like, 4 is, 5 has just written, 6 was published, 7 will know, 8 helps, 9 is not raining, 10 were playing
II) 1 Do people travel to Scotland to enjoy the beautiful scenery? (general) People travel to Scotland to enjoy the beautiful scenery, don't they? (tag) Where do people travel to enjoy the beautiful scenery (where)
2 Did the British taste tea or coffee in about 16:50? (alternative) Who tasted tea in about 16:50? (who) When did the British taste tea? (when)
III 1 took, 2 would buy, 3 was, 4 didn't like, 5 was
IV 1 Tom told Ann not to be late to his party. 2 Nick said that John had bought a TV-set that week. 3 My mother told me to come home earlier that day. 4 I told Jane that I would phone her soon. 5 Pete said that his father worked for a television company