20. ---- Aren’t you cold?

　 ----____. I’m boiling.

　 A. Take it easy.　　 B. That’s all right.　 C. Not a little.　　 D. Far from it.

19. -Did you make sense of what the man said just now?

-No, his meaning didn’t　　　 .Would you explain it to me?

　　　　 A．get through　　 B．get off　　　 C．get across　　　　 D．get out

18. He suffered from a serious injury ; ______, he kept on working hard at his lessons..

　 A. though　　　 B. even though　　　　 C. even so　　　　 D. therefore