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What will our planet look like if we ________our nature?
A didn't protect     B won't protect      C don't protect
What would we have done if his father _______rich?
A wasn't                B hadn't been        C hasn't been
If I _____you, I would apologize first.
A were                  B am                     C be
If he ______the coffee, it would be sweeter.
A had stirred        B have stirred       C stirred
If we had enough petrol, we______there before night.
A got       B get         C will get        D would get 
If the doctor didn't operate on him ,he________.
A would die        B will die              C would have died
If it_____not so foggy, we should reach the station on time.
A is                     B were                  C   was
What would have happened if  Ralf______his head?
A  lost                 B has lost             C  had lost
I shall easily repair the fence if I ______a hammer
.A will have         B have                 C  had
 I______you if you didn't write letters.
A  will miss        B miss                 C would miss