是不是我想既拿opt工作又想注册课的话，就必须注册full time student 然后同时工作20h/week?
-No, you can just work at least 20 hours/week and then, register some courses you want. Not need to register as a full-time student unless you want to give up OPT (do not want to work or work less than 20 hours/week).
