1) The secretary usually comes/is coming to the office at 9 a.m. 2) Dave works/is working for an advertising company. 3) Jim and Nelly fly/are flying to Prague in two days. 4) Roger always leaves/is always leaving dirty plates on the table! 5) The seminar starts/is starting at ten o’clock. 6) The number of taxes increases/is increasing nowadays. 7) The article contains/ is containing a lot of useful information. 8) Isabel works/is working at a department store at present. 9) Trees produce/are producing oxygen. 10) Stuart seems/is seeming to be a reliable person. 11) This café belongs/is belonging to Tina’s parents. 12) She knows/is knowing where the children are. 13) Mr Boyle takes part/is taking part at the congress these days. 14) Sarah has/is having an interview right now. 15) I think/am thinking this is a perfect job for you. 16) Miss Lane has/is having a small flat in the suburbs. 17) You look/are looking very pale. 18) Gordon thinks/is thinking of spending a week in Thailand. 19) Our chief is/is being very annoyed today. 20) These flowers smell/are smelling sweet.