His mother bought a pair of pants for him.Do you think it's nice
问题描述：
His mother bought a pair of pants for him.Do you think it's nice
it's or they're
答
但就本句而言,用it's 或 they're都可以的.
如果问话者强调a pair .则用单数it's；而如果问话者强调 pants ,则又可用复数they're.这里的语法环境要求较宽松,尤其在口语中.