Собъяснением. 1. match the sentences (a-c) with the rules (1-3) a. the students' exam are good b. in karen and andy's opinion, tablets are a good idea. c. for the school's head teacher, technology is important. 1. after singular names or nouns, we add's 2. after plural nouns ending in s, we just add an apostrophe ('). 3. after more than one name, the's goes after the second name.