He must be in the park ? A. must not heB. isnt beC. neednt heD. doesnt he

问题补充：

He must be in the park , ?

A. must not he

B. isn\t be

C. needn\t he

D. doesn\t he

答案：

A. must not he

(答案→)B. isn\t be

C. needn\t he

D. doesn\t he

解析：在用 may be / must be / can be 表推断时，要根据人称使用后面的 be 动词。