They ____ on the program for almost one week before I joined them, and now we _____ on

it as no good results have come out so far.[ ]

A. had been working; are still working

B. had worked; were still working

C. have been working; have worked

D. have worked; are still working

肩关节伸展、外展、内旋的主要肌肉包括（）

A.拇外展肌

B.尺侧腕伸肌

C.指长伸肌、蚓状肌、骨间肌

D.阔筋膜张肌、股直肌、臀中肌、臀大肌

E.背阔肌、三角肌（中、后部）、肱三头肌、大圆肌、肩胛下肌