Underline the correct item. 1 They are bored/puzzled because they have nothing to do. 2 The teacher was angry because his students were good/naughty. 3 He fell asleep because he was very worried/tired. 4 They knocked/waited on the door, but there was no answer. 5 What on earth/Mars do you think you're doing? 6 She introduced/opened me to her parents. 7 They decided/shouted to go to the party. 8 Tom gave/saw a ghost in the hall. 9 She came/jumped back late at night. 10 We heard/said a strange noise.