4 complete the sentences. use couldn't and the verbs below. find, finish, go, have, sleep understand, watch.1 We a barbecue because the weather was bad. 2 Sandra her wallet. it wasn't in her bag.3 Martin a dvd because his dvd player was broken. 4 Sam wasn't hungry - he his dinner. 5 To school because | was ill. 6 We kumiko because we don't speak japanese. 7 Harry was very tired, but he​