Will you see to _____ that all the papers should be handed in after class?— All right. [ ]

Sit down, please! . —_______________.

I was out of town at the time, so I don’t know exactly how it _______

What he said just now ___________ me of that American professor.

小明跑步健身，坚持一段时间后想放弃，以下句子最适合用来激励他的一项是（　　）