1. Tim went to work on Saturday but it was not nesessary. Tim........... to work on Saturday. (NEEDN'T) 2. A beautician was polishing my nails I....................... polished (HAVING) 3. You must not push this button. Under no ...................push this button. (CIRCUMSTANCES) 4. ,I am really sorry for damaging your mobile phone, Chris said to me. Chris..............................my mobile phone. ( APOLOGISED)