2.Fill in the gaps with the Past Continuous of the verbs in brackets. a) The teacher __________ (not talk) when Mary arrived.b) The pupils __________(play) when the bell rang.c) Lucy __________ (do) her homework when someone knocked the door.d) Mark´s parents __________(write) him a letter when they heard a crash.e) Ann __________ (not sleep) when the alarm clock rang.f) They __________(not watch) TV when their parents arrived.