2 【单选题】If I_harder at school,I would be sitting in a confortable office now. A、had worked B、worked C、were to work D、were working

2
【单选题】If I_harder at school,I would be sitting in a confortable office now.
A、had worked
B、worked
C、were to work
D、were working

出自：兰州工业学院-大学英语二

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