There are ______ students in the school . But I don’t know _______ the girls among them .
We first met on a train in 2000.We both felt immediately that we _____ each other for years.
—I had been working till 4∶00 a.m. to prepare a report for my boss.—________you look very tired.
John didn’t choose of the ties and went away without looking at a third one.
The little boy was so careless with his spelling that she often_____ letters from words.
—You see, I’m poor in maths, you are not good at English, and... — That’s ____ we should help each other.