单项选择题
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.
A．think of money B．look at each other C．pay attention to it D．stop crossing the street