He asked me for this book many times. Please tell him that he have it tomorrow.A. mustB.

问题补充：

He asked me for this book many times. Please tell him that he have it tomorrow.

A. must

B. may

C. shall

D. both B and C

答案：

A. must

B. may

C. shall

(答案→)D. both B and C

解析：may和shall均可表“允诺”。