Though the medicine for my disease I should often at home or in the open air.A. works out

问题补充：

Though the medicine for my disease, I should often at home or in the open air.

A. works out; work out

B. is working; work out

C. is working out; work

D. works; work

答案：

A. works out; work out

(答案→)B. is working; work out

C. is working out; work

D. works; work

解析：考查动词及动词短语用法。Work out锻炼；计算出；制定；work工作，起作用；句意：尽管这种药对我的病很起作用，在家里的时候我还是应该到户外去锻炼。本题的work指起作用；work out指锻炼。故B正确。