※ 밑줄 친 부분에 가장 적절한 것을 고르시오. [문 7～문 8] M:What's that noise? W:Noise? I don't hear anything. M:Listen closely. I hear some noise. _________________. W:Oh, let's stop and see. M:Look! A piece of glass is in the right front wheel. W:Really? Umm... You're right. What are we going to do? M:Don't worry. I got some experience in changing tires.