单项选择题
A．to do other work than on VDTs B．to change their computers if necessary C．to go back home to have a rest D．to have their health tested
A．Study shows working with VDTs would cause miscarries (流产）. B．Study shows even low levels of radiation is harmful. C．Study shows working conditions rather than VDTs have the pregnancy ended unexpectedly. D．Study shows stopping working with VDTs is the best way to protect women's healt