Mark the letter A, B, C or D on your answer sheet to show the underlined part that needs correction in each of the following questions
Our nervous system has over ten (A) billions (B) nerve cells in a network covering (C) every inch of our skin and (D) organs
A. billions
B. nerve
C. every inch
D. organs
Đáp án A
Billions => billion (billions of + danh từ số nhiều / số lượng + billion + danh từ số nhiều)