题目内容
Whose turn ___ the cleaning?
A. is it doing B. is it to do C. is doing D. is to do
Whose turn _______on duty today?
A. it is to be B. is it to be C. is it D. it is
A. is it doing B. is it to do
C. is doing D. is to do
A. it is to be B. is it to be
C. is it D. it is