Câu hỏi: 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.
How long it has been since you arrived in the United States?
A. it has been
B. since
C. arrived
D. the United States
How long it has been since you arrived in the United States?
A. it has been
B. since
C. arrived
D. the United States
Phương án D được sửa lại là has it been
Đáp án A.