—Look! _________ clean the classroom looks ! —Yes. I’m sure somebody _______ it up.
A. What, has cleaned B. How, has cleaned
C. What, cleaned D. How, cleaned
—Look! _________ clean the classroom looks ! —Yes. I’m sure somebody _______ it up.
A. What, has cleaned B. How, has cleaned
C. What, cleaned D. How, cleaned
B