(1)
A)18 American undergraduates.
B)18 American postgraduates.
C)18 overseas undergraduates.
D)18 overseas postgraduates. (2)
A)Family relations.
B)social problems.
C)Family planning.
D)Personal matters. (3)
A)Red.
B)Blue.
C)Green.
D)Purple. (4)
A)The five questions were not well designed.
B)Not all the questionnaires were returned.
C)Only a small number of students were surveyed.
D)Some of the answers to the questionnaire were not valid.
原文：
Passage Three
On 15th, Feb, 1989, an instance survey was carried out among 18 overseas postgraduate students. 11 students were male and 7 were female. The purpose of the survey was to discover the view of the students on a number of matters of personal concern. The survey was conducted by means of a questionaire given to the students to complete. There were five questions. The first question concerned favorite color and the second favorite number. The next 3 questions were all concerned with aspects of marriage. No. 3 looked at the ideal age to get married, No. 4 examined the qualities looked for in a partner and No. 5 asked about the ideal number of children. The main findings were as follow: Blue was the most popular color. This was followed by green and purple. There was no real significance in the choice of lucky number. About one third of the students said that they had none. Sixty-one percent of the students selected the age group 26 to 30 yeare as ideal for marriage, followed by 21 to 25 years. In looking at the most important qualities in an ideal partner, someone hoped the person to be intelligent, others chose natural, still others indicated attractive and honest. The ideal number of children was 2, followed by 3. It is not easy tO reach any definite conclusions based up on such a small sample of students from such widely different backgrounds. However, it is clear that majority favored of 26 to 30 is the ideal age to get married with an intelligent partner, and producing 2 children.
17. Who were involved in this instance survey?
18. What do the 5 questions to be answered focus on?
19. What color was chosen as the most popular in the survey?
20. Why is it difficult to reach any definite conclusions be the survey?