You shouldn't (竞争)with your classmates to get better grades.
这位老人非常激动,以致于不能清晰地讲话.
我看见Mary正在房间里安静地看书.
明天别忘了带上你的外套.
五月份有31天.
有人担心将来机器人会取代人类.
Some people worry that robots will take the place of humans the .