--Whose tennis racket is this Linda?--Look! Jerrys name is on it! It be his.A. mayB. mu

问题补充：

--Whose tennis racket is this, Linda?

--Look! Jerrys name is on it! It be his.

A. may

B. must

C. can

D. mustn

答案：

A. may

(答案→)B. must

C. can

D. mustn

解析：根据答语的内容Look! Jerrys name is on it!可推知，答案为B，表示肯定的意思。