There is ________"U" and ________"A" in the word "umbrella".A. a:an B. an; an C.an; a
This room is _________for you to live in.
—Do you walk to school every day? —I used to walk, but now I ride to school _______ walking.
______ careful you are, ______mistakes you will make.
—Do you know if he ____ to play football with us? —I think he will come if he _____ free tomorrow.
This place is worth _______.