Change the following sentences from passive into active. 1.marmalade is made by this factory. 2.this town was planne by him two centuries ago. 3.the fax will be sent by the secretary. 4.they were invited by mary to the party.

1. The factory makes marmalade 
2. He planned this town two centuries ago
3. The secretary will sent the fax
4. Mary invited them to the party

1. This factory makes marmalade .
2. He planned this town two centuries ago .
3. The secretary will send the fax.
4. Mary invited them to the party .