单项选择题
A．if the winter is especially warm B．during all of the year except the winter C．in the winter as well as in other seasons D．during the evenings in the winter
A．Bussiness management policies. B．Driving to work. C．Extending the work place by means of computers. D．Computers for child—care purposes.
A．A scientist in a laboratory developing plans for a space station. B．A technical writer sending via computer documents created at home. C．A computer technician repairing an office computer network. D．A teacher directing computer--assisted learning in a private school.