—Jessie,don'tyouthinkitexcitingtoskateonthefrozenrivern...

问题详情：

—Jessie, don't you think it exciting to skate on the frozen river now?

—Think twice; you            fall into the water for the ice is still too thin．

       A． would              B． must                       C． shall                   D． should

【回答】

C

知识点：情态动词

题型：选择题