We were having dinner when she _________________________., arrived, was arriving, arrives, is arriving, When the war broke out, we ____________________________ in Hiroshima., lived, were living, live, are living, I ____________________ to the concert when somebody knocked at the door., listen, was listening, have listened, listened, He was driving very fast when the accident _____________________., happens, is happening, has happened, happened, They _________________ tennis when we _____________ there., play / got, have played / were getting, were playing / got, played / are getting, My son __________ his knee badly while he __________________ his bicyle yesterday., was hurting / rode, hurt / was riding, hurts / is riding, has hurt / rides, While the scientist ______________ in her laboratory, she accidentally ________________ a discovery., was working / made, is working / was making, worked / is making, has worked / makes, At half past eleven, he ______ still ______________ his homework., is / do, has / done, do / did, was / doing, While Eva ..............at clothes, Pops .................. to tell a stroy., looked/ started, was looking/ was starting, was looking/ started, looked/ was starting, The princess............ an accident while she ..............., had/ was dancing, has/ was dancing, was having/ danced, having/ dancing, A snake ................. them when the princess ...................into the river., was watching/ was falling, watched/ was falling, watching/ was falling, was watching/ fell, Eva ............... on the necklace when the princess Zara ............. , putting/ appear, was put/ appearing, was putting/ appeared, put/ appeared.

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