Answer:
C) The winner of this grueling race, covering more than a thousand miles, becomes famous!
Explanation:
The statement uses the adjective grueling to describe the race, which means very tiresome. It also adds that the race is over a thousand miles, which is a very great distance.
Answer:
He might arrive later tonight.
Gary has not yet flown to Detroit.
he could have been walking in the rain
There is a lot of drought here, (not sure about this one sorry)
He might have missed the plane
Explanation:
I answered this earlier. The answer is can