问答题
A．parents should be trained to read to their children B．the more children read, the more intelligent they will become C．children’s language skills increase when they are required to respond actively D．children who read actively seem six months older
A．there was a shortage of workers on American farms B．the most important of the early invention was the iron plow C．after 1869, many people devoted their attention to the plow D．Charles Newbolt had made a fortune by his cast-iron plow