No one can ________ how the election will turn out，as there are many unknown facts.

The doctor was busy writing an essay in ________ with his recent research.

At the end of the race his legs ____ and he fell down on the ground.

That hero who died in the war was so brave that he never ____ ____ to the enemies until death.

    by his neighbors’reply，Albert decided to make enquiries about the stolen car himself.