.You look tired . working indoors you should be out for a walk.A. Because ofB. Instead ofC

问题补充：

.You look tired . working indoors you should be out for a walk.

A. Because of

B. Instead of

C. Thanks to

D. As for

答案：

(答案→)A. Because of

B. Instead of

C. Thanks to

D. As for

解析：句意：由于在室内工作你看起来很累，你应该出去散步。A .Because of 由于…..后加名词 代词动名词 B. Instead of 代替而不是 C. Thanks to幸亏由于 D. As for 至于，由于。根据题意故选A