There’s________ “u” and _______ “m” in the word “number”.
I can use my ________ to take high-quality images.
Life on Mars will be better than life on Earth __________many ways.
-_________I have a try on this pair of boot ? -Yes,you _________.
This is a big class,and _________of the students _________boys.
Spacecraft can travel ______the speed of light .