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 (A) basic elements of public-opinion research (B) are interviewers, questionnaires, (C) tabulating equipment, and (D) to sample population. A. basic elements B. are C. tabulating D. 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 (A) basic elements of public-opinion research (B) are interviewers, questionnaires, (C) tabulating equipment, and (D) to sample population.
A. basic elements
B. are
C. tabulating
D. to sample
Đáp án D
Chúng ta thấy trước liên từ “and” thì động từ được chia ở dạng V-ing => phía sau liên từ “and” củng chia động từ cùng dạng (cấu trúc song song)
Đáp án D (to sample => sampling)