A．written B．signed C．acted D．agreed
单项选择题25（）
A．job B．idea C．opinion D．work
单项选择题Acrobats and gymnasts are in danger of hurting themselves in Cirque du Soleil performances because（）
A．they haven’t practiced enough B．the equipment is in need of repairs C．they perform risky acts without nets D．some are HIV positive
