【单选题】- How long is it ______ you picked up your badminton training? - It was not until my finance became better in last December ______ I started the training. [ ]
【单选题】—How long is it ______ you picked up your badminton training? —It was not until my finance became better last December _____ I started the training.
【单选题】—How long is it since you picked up your badminton training? —It was not until my finance became better last December _______ I started the training.