第二节语法填空（共10小题；每小题1.5分，满分15分）
阅读下面短文，根据上下文填入适当的词语，或使用括号中的词语的适当形式填空，并将答案填写在答案标号为36—45的相应位置。
Foreign students are valuable to the United States. Many take   31  in important research. Most have to   32  the full costs for their education. That helps universities meet their budgets. International students and their   33  put 12,000 million dollars into the American economy last year. That number is from the Institute of International Education, based in New York.
Now, many education officials say they are concerned that   34  students will come to the United States for the next school year. The officials base their concern partly on a decrease in students  35 (plan) to attend intensive English programs during the summer.
The members said one reason  36the expected decrease is slower and more restrictive United States action on travel documents.   37 (secure) has increased since the terrorist attack of September 11,2001. The schools also blamed the travel problems caused by the outbreak of SARS.
In recent years,   38  increasing number of students have come to the United States to study. The Institute of International Education says these students represent more than four percent of all students in American colleges and universities.   39 says the number of international students reached a   40  high of more than 580,000 last year. The largest number came from India. Before last year largest number came from China.