— If you listen to me you take a good rest at once.— OK I do so.A. should; mustB. shal

问题补充：

— If you listen to me, you take a good rest at once.

— OK, I do so.

A. should; must

B. shall; will

C. must; would

D. may; can

答案：

A. should; must

(答案→)B. shall; will

C. must; would

D. may; can

解析：句意：--如果你听我的话，你将马上可以休息一下。--好的，我现在就做。should应该；must 必须；shall表允诺; will表临时做的决定的将来要做的事。may可以; can能够。would过去将要。根据句意故选B。