What book are you reading? Wow Harry Porter! May I have a look at it?Yes of cour

问题补充：

--- What book are you reading? Wow, Harry Porter! May I have a look at it?

--- Yes, of course. You have it as soon as I get through with it.

A. must

B. should

C. will

D. shall

答案：

A. must

B. should

C. will

(答案→)D. shall

解析：考情态动词的辨析。shall表允许和承诺。