As it can be inferred from the passage, sociologis...
Câu hỏi: As it can be inferred from the passage, sociologists can be frustrated when _________.
A respondents often do not complete and return questionnaires
B questionnaires are too difficult to read
C questionnaires are too expensive and difficult to distribute
D respondents are too eager to supplement questions with their own options
Câu hỏi trên thuộc đề trắc nghiệm
Đề luyện thi THPT Quốc gia môn Anh 2019 - Đề số 17 (có video chữa)