228. Oh, the classroom is so dirty. It n
题型:选择题
问题:
228. Oh, the classroom is so dirty. It needs ______ before we begin our class.
A.cleaned
B.being cleaned
C.to clean
D.Cleaning
228. Oh, the classroom is so dirty. It needs ______ before we begin our class.
A.cleaned
B.being cleaned
C.to clean
D.Cleaning