6.Venice (be )a city in Italy which (build) on water many centuries ago.The canals (be) very deep and the people of Venice must (travel ) around in boats to reach their schools, businesses and shops.Recently, the water in Venice’s canals (find) to contain a great deal of pollution and even poison in it.The water could cause people sickness if they (drink) it or used it for (cook ).The government of Venice is trying (solve) this problem as quickly as they can.
7.Tooth decay (start ) early in life .It (continue) throughout adult life so that many of us will (lose) quite a few of our teeth by the time we (reach) old age.There (be) two causes of tooth decay .One cause is that many of us (not take ) proper care of our teeth.Besides that, we eat a lot of sugar food, thus (result ) in tooth decay .Ever since we (be) young, we (encourage) to brush our teeth properly and regularly. However, most of us (not follow) this advice and neglect our teeth.
8.My mother called me around five o’clock.My husband came home a little after that.When he (come) home, I (talk) to my mother on the phone.
9.Jack moved to Hong Kong after he graduated from the university .Jack (be) in Hong Kong since he (graduate)
10.As the taxi (speed ) on , Mary (look) out of the window .It (rain ) , so the road (be) wet.She looked forward to (go ) home after a long holiday abroad .The taxi (slow ) down and then stopped at the airport.Mary got out of the tax.While she( look ) for money in her purse to pay the driver, he (take) out her luggage .Then he (return) round to receive the fare. He (be) in the same secondary school as her.In fact , he was a former classmate.
