1) The police have been looking form him ______ a month. a) Since b) For 2) I have been working _______ I got up. a) Since b) For 3) Our dog has been ill _______ two days. a) Since b) For 4) Things have changed _______ he became the headmaster. a) Since b) For 5) We´ve had terrible weather _______ last Saturday. a) Since b) For 6) It has been foggy _______ some days. a) Since b) For 7) We have been waiting for the bus _______ half an hour. a) Since b) For 8) I have known Tom _______ 1990. a) Since b) For 9) The pilots has been in strike _______ two months. a) Since b) For 10) He has been fishing _______ six o´clock. a) Since b) For 11) They have been living in France _______ eight years. a) Since b) For 12) Nobody has seen him _______ last Friday. a) Since b) For 13) she hasn´t lost a match ______ April. a) Since b) For 14) The kettle has been boiling _______ ten minutes. a) Since b) For 15) I have been looking for this book _______ a long time ago. a) Since b) For

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