1: A supermarket is going to be built on our street b the workers
2: Were jeans made two hundred years ago?
3: A whistle will be blown if there is an emergency
4: The animals are kept by the zookeeper twice a day
5: My father hasn't smoke since last year
6: The editor hasn't written to Mai for a month
7: When did you start to learn Spanish?
How long ago did you start learning Spanish?

1 A supermarket is going to be built on our street by the workers.
2 Were jeans made two hundred years ago?
3 A whistle will be blown if there is an emergency
4 The animals are kept by the zookeeper twice a day.
5 My father hasn't smoke since last year.
6 The editor hasn't written to Mai for a month.
7 When did you start to learn Spanish?