Viewers will have ______ second chance to see Saturday’s concert on ______ Channel 4 tonight.

A．a; the

B．the; the

C．the; 不填

D．a; 不填

漂发前，一要（）；二要洗净头发并擦干；三要准备好漂发用的工具用品。

A.检查头皮，进行皮肤测试

B.带好手套、围、毛巾和披肩

C.调好漂发剂

D.观察判断头发性质