A、He fixes bicycles. B、He raises sheep. C、He sells chairs. D、He’s a gardener. A词义理解题 根据front tire和seat座位两个关键词可以判断双方正在谈论修理自行车的事情，

W: John seems to have 10st a lot of weight recently.
M: Yes, he’s been training hard with the soccer team.
Q: What has John been doing recently?

M: The front tire is flat, and the seat needs to be raised.
W: Why not take it to Mr. Smith?
Q: What kind of work does Mr. Smith probably do?