1.Iwon't be able to do anythings unless I have a quiet room
=>If I don't have.............................................................
2.The students startede to collect old  clothes for their charity progamme last week.
=>The students have....................................................................
3.We will probably go to the moon for our summer holiday in 2050.
=>We might.....................................................................
4. 99% of households in America have at least one TV.
=>Nearly all.....................................................