51.After his wife gave birth to thier first son,he imedately(buy)........................a nice cradle. 52.I (study).......................French at the moment,but I (not speak)............................it very well yet. 53.I usually (work) ....................at night,though I (have)......................a holiday at the moment. 54.He (teach)......................in a language school,though they (not work)........................in a factory at the moment because the school’s on holiday. 55.Jet engines(make)...........................a lot of noise. 56.I (not live)............................in London.I(live).......................in Brighton. 57.The sea (cover).........................two thirds of the world. 58.Loud music(give)....................me a headache. 59.We (not come)...............................from Canada.We (come)....................from USA. 60.She (work)......................from Mondays to Fridays.She (not work)......................at weekends.