Grammar wars everybody should win

A new security system .......in our company right now.

I am not sure .....that.

I.....if I knew myself.

What time.....to Madrid tomorrow? Could we talk before you leave for the airport.

The Prime Minister......the speech at 3 p.m. tomorrow.

We were really well prepared, we....for over a week.

It is the first time we....with them.

While we....... for the boss to start speaking, he looked at his phone and left the room.

I........earlier if my computer had not crashed.

We will not be able to lower the price unless you....

The issue....... .We will have to discuss it later.

We didn't realize the boss... later that day.

These confidential document should.......to any one ouside the department.

When he has been promoted he...

I.....of early retirement. What would you say if I took it?