Plastic bottles can be recycled but they
题型:选择题
问题:
Plastic bottles can be recycled but they need cleaning thoroughly, _______ they?
A.needn't
B. don't
C.mustn't
D.can't
Plastic bottles can be recycled but they need cleaning thoroughly, _______ they?
A.needn't
B. don't
C.mustn't
D.can't