1,she shows the students around the city .............................................................................. 2, people speak french and English in canada ............................................................................... 3, they bought some flowers for thier mother ................................................................................... 4,they invited a lot of people to thier party last night .......................................................................................... 5, alexander bain invented the facsimile in 1843 ............................................................................................ 6, Ba invited liz to the festival .................................................................. 7,the fire destroyed many houses in my neighborhood ........................................................................................... 8, Nam is writing aletter to his friend ....................................................................... 9, my friends are making some phone calls in the evening ...................................................................................................... 10, they are repairing my piano at the moment .......................................................................................... 11, he was preparing the report when i came ..................................................................................... 12, the government h¸n't changed the regulation ...................................................................................... 13,we haven't finished our homework yet ................................................................................. 14, someone has given him a lot of money ................................................................................. 15, they will grow a lot of trees in the park ..............................................................................