24. “The net profits _________ be divided into three parts according the agreement” said the judge.

　 A. must　　　 B. should　　　 C. may　　　　　 D. shall

23. ________is known to us all is that the old scientist, for __________ life was hard in the past, still works very hard in his eighties.

　 A. As; whom　　　　 B. What; whom

　 C. It; whose　　　　　 D. As; who

22. __________is generally considered to be first invented by Charles Babbage.

　 A. A computer　　　　 B. The computer

　 C. Computer　　　　 D. Computers

21. – Ellis, I’m sorry. I can’t fly a kite with you tomorrow.

　 -- _______________

　 -- I fell off my bike yesterday and my leg hurts.

　 A. How is it?　　　　 B. So what?

　 C. How come?　　　　 D. What’s the problem?