【单选题】

Wei Feng andAnn is playing in the zoo.

Wei Feng: Look,Ann! What’s that monkey doing
Ann: He is (41) (42) a ball.
Wei Feng: He is (43) the ball (44) his friends.
Ann: Ha, ha! His friends can’t (45) it.
Wei Feng: Where’s the ball now
Ann: Look! It’s over there, on the hill.
Wei Feng: They’re (46) it.
Ann: No, they aren’t. They can’t reach it.
Wei Feng: Look at that little monkey. He is climbing (47) the hill. The ball is in his hands.
Ann: What’s he going to do with the ball He doesn’t want to give (48) his friends.
Wei Feng: Right. They’re (49) (50) him. They want to get the ball. They’re running all the time.
[A]after [B]before [C]of