听力原文：Nobody likes staying at home on a holiday weekend--especially if the weather is f

听力原文： Nobody likes staying at home on a holiday weekend--especially if the weather is fine. Last fourth of July we decided to spend the day in the country. The only difficulty was that thousands of other people had exactly the same idea. We moved out of town slowly in heavy traffic, but at last we were able to turn off on a quiet side road and, after some time, stopped near an old farmhouse. We had brought plenty of food with us in a big picnic basket and we got the basket out of the car. We spread things out on the ground near a path at the foot of a hill. Everything was ready now, so we sat down. It was very peaceful in the cool grass until we heard bells ringing at the top of the hill. What we saw made us pick up our things and run back to the car as quickly as possible. There was a flock of a hundred or more sheep coming down the path directly towards us!

(20)

A．In the countryside.

B．At the top of a hill.

C．By a river.

D．On a grassland.