13.The reason is____________ smoking tobacco causes illness.
A. why      B because      C. that      D. because of

15．We know it is hard to make such a decision____he has just built up the team for a year and the project is going through the important stage now.

第二部分：英语知识运用（共两节，满分45分）
第一节：单项填空（共15小题；每小题1分，满分15分）
从每题所给的A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
21. I wonder    we haven’t received her invitations yet. Her wedding is only two days away.
A. how        B. why           C. that           D. When

31．The fact that smoking is harmful to health is____most smokers are quite aware of．

29.An example of them is fraud, a crime _______ money is stolen by cheating others.

25．The fire spread fast．Luckily the local government had brought it under control___the situation got worse．

31. It is on the maglev train that is very comfortable _____ I have been to the People’s Square.

26. My suggestion _____ John should be sent _____his mother works is reasonable.

25. The American Civil War lasted four years _____the North won in the end.

32. The college education system should be reformed ______ it can follow the pace of the
economic development.