下面哪些是我们在设计调查问卷时应该注意的？

A.You should try putting the questions to a classmate before beginning the full survey，and be ready to modify any that were not clear.

B.Do not collect unnecessary information.

C.Keep questions clear and simple，and not too personal.

D.Limit the number of questions so the respondent can answer them in a minute or two.

E.Closed questions are easier to process，but open questions will collect a wider range of responses.

正确答案：You should try putting the questions to a classmate before beginning the full survey，and be ready to modify any that were not clear.Do not collect unnecessary information.Keep questions clear and simple，and not too personal.Limit the number of questions so the respondent can answer them in a minute or two.Closed questions are easier to process，but open questions will collect a wider range of responses.