1. B完整的定语从句为：whose open mouth the tea was supposed to come through=the tea was supposed to come through whose open mouth=the tea was supposed to come through the teapot's open mouth固定搭配：be supposed to do sth如果用its则两个并列句之间缺少and/so等连词连接2. C主语从句____ the workers insisted on中on缺少宾语，所以用what(that在从句中不能充当任何成分)；表语从句应该...
