____ speaking, I didn’t do it on purpose

The fact suggested that the water _______ and to prevent this from happening again, John Snow suggested that the source of all the water supplies ______.[ ]

-Are you happy with your new computer?—– No, it is _______ me a lot of trouble.

Since you are in a hurry, why don’t you ______ for a taxi ______ stay here waiting for the bus

Henry______in a bank for four years since he left school.