—How many students are there in your school?—      the students in our school      over two thousand. 

I ________ use a clock to wake me up because at six o’clock each morning the train comes by my house.

-Must I use both hands?-Yes, you _____.

---____, sir, how can I get to the nearest bank?-- You can ________ a No 2 bus at the station..

Even a drop of water ______because it is so important to all the living things.