题目

完形填空 Some time ago, my wife and I travelled to Sydney to visit my sister. We had taken more clothes than we needed and struggled onto the train. In front of us, in a face­to­face seat, __1__ six young men in their early 20s. They were strong and __2__， and I disliked them immediately. They were laughing loudly, obviously __3__ themselves and they __4__ a foreign language. As we went quickly __5__ the countryside, I kept an eye on them as they joked around. Sometimes they took a look in our direction. When two of them got __6__， I relaxed a little. The rest of them __7__ to在△ABC中,已知∠A+∠B=∠C,则△ABC是( )A.直角三角形B.锐角三角形C.钝角三角形D.无法确定