If he (a)   (not test) them, they wouldn't have known they were ill.

If you had known what his reaction would be, (a)   (you + still + to invite) him?

If you (a)   (to ask) someone from the audience, you would find out how ill-informed they were.

If you … (to tell) me the truth, I would have helped you, but you lied to me!

(a)  

The PM would remember the facts if he (a)   (to do) his best.

I wouldn't do that if I (a)   (to be) you.

I (a)   (to study) harder if I had known that the test would be so difficult.

I (a)   (to be) thrilled if you invited me to your party.

If you guarantee that I can return the product I (a)   (to order) immediately.

(a)   (you + help) him, if you had known how unreliable he is?

If we don't do anything about climate change, our planet (a)   (go) down the drain...

Translate: Als ik mijn examens haal, ga ik op een lange reis (trip)

(a)  

Translate: Ik had het je verteld als je het mij gevraagd had.

(a)  

Translate: Ik zou die telefoon gelijk (right away) kopen als het minder duur was.

(a)  

Translate: Als je die vakantie (holiday) eerder (sooner) had geboekt, had je minder betaald.

(a)