My mother often tells me _______ my classmates when they need.

Grandpa is growing old. He keeps on       the same thing over and over again.

The smile on his face makes him _______ really ______.

---Your car looks nice,is it new,Mr Smith? ----No,I just got my old car_______yesterday.

---Do you prefer _______ to Beijing by air?---I would rather _______ a train.