单项选择题
A．To protect the boots from water. B．To protect the soles from heat. C．To protect the floors from soles. D．To protect the boots from rubber.
A. I prefer B. that’s OK C. I’d love to D. What do you like E. Would you like to go F. That sounds fine G. cannot work H. have to work late
A．As its gases run out, it cools down. B．It collides with other stars. C．It can only live for about a million years. D．As it gets hotter and hotter, it explodes.