【单选题】

Jim was driving along a road on one night. Suddenly (41) became wrong with his car wheel (轮胎). He did not know (42) to do and, worse still, he did not have a (43) wheel with him! Joe (44) to passing cars, but not even one of them stoppeD、

At last, he tried a car just (45) his own. To his surprise, the car stopped and a young (46) got out. Joe felt hopeless (47) he didn’t think she could help him. The lady, (48) , gave him her own spare wheel, but Joe had to say that he had never changed a wheel in his life!
She began to work (49) and fitted(安装) the wheel (50) a few minutes.
A．but
B．however
C．for example