Question

don't be in hurry.the bus _(arrive )in an hour.
l think you should revise more , you _(make ) a lot of mistakes recently.
The singer _(sing) the last song when l left the concert .

Answer 1

arrives, have made, was singing

Answer 2

Don't be in hurry. The bus arrives in an hour.

l think you should revise more. You have been making a lot of mistakes recently.

The singer was singing the last song when l left the concert .