知乎，让每一次点击都充满意义 —— 欢迎来到知乎，发现问题背后的世界。 If he drops the course now, underneath the most optimistic outcome he’ll get an incomplete, and he could fail. The problem of locating a great substitute for "guys" suggests that the utilization alone could be out of date. Share Enhance this solution Observe Incorporate a comment By https://g.page/r/CR8gTwLrrP70EBM