24. This novel was written by his father’s won _____.
A. result B. account C. reason D. increase
23. Could you tell me what is the _____ of the experiment?
A.result B. account C. reason D. increase
22. One of the consequences of our planet’s being warning up is a(n) _____ in the number of natural disasters. (2003上海)
21. Air is a _____ of gases.
A.variety B. mixture C. extension D. combination
20. More and more people choose to shop in a supermarket as it offers a great _____ of goods. (2003上海春)
19. There is no _____ to doubt the truth of the statement.
A.occasion B. case C. situation D. background
18. Please remind me of it again tomorrow in _____ I forget.
17. The collapse of the World Trade Centre has put US economy in a difficult _____. (2003上海春)
16. --- What is the _____ for your being late?
--- I am sorry I missed the first bus.
A.reason B. excuse C. cause D. explanation
15. --- I am sorry I stepped outside for a smoke. I am very tired.
--- There is no ______ for this while you are on duty. (2003北京)