Mark the letter A, B, C, or D on your answer sheet to show the underlined part that needs correction (from 30 to 34)
Air pollution, together with (A) littering, are (B) causing many (C) problems in our large, (D) industrial cities today
A. with
B. are
C. many
D. in our large
Đáp án là B
A together with B + V(A): chia động từ theo chủ ngữ thứ nhất. “are”->”is”.