请选择AB7^7`1z(Q They ________ windows now .They windows every Friday .,O8K5b7K4n3A4n1C9?)~1u2|2~*F3C
A.clean,O8K5b7K4n3A4n1C9?)~1u2|2~*F3C
B.are cleaning,O8K5b7K4n3A4n1C9?)~1u2|2~*F3C