“If we had a calculator, we could work this out a lot quicker” they said.
A.They said if they have a calculator, they will work this out a lot quicker.
B.They said if they will have a calculator, they work this out a lot quicker.
C.They said if we had a calculator, we could work this out a lot quicker.
D.They said if they had a calculator, they could work this out a lot quicker.

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