Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.The basic elements of public-opinion research are interviewers, questionnaires, tabulating equipment, and to sample population. A. basic elements B. are C. tabulating D. and to...
Đọc tiếp
Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.
The basic elements of public-opinion research are interviewers, questionnaires, tabulating equipment, and to sample population.
A. basic elements
B. are
C. tabulating
D. and to sample
Đáp án D
To sample → sampling vì hai động từ nối với nhau bằng liên từ and phải cùng dạng để đảm bảo sự hài hòa