John said that his brother __________at home then.
A. is
B. were
C. was
D. has been
Câu trả lời là: C là đáp án đúng
Công thức nguyên hàm và tích phân
John said that his brother __________at home then.
A. is
B. were
C. was
D. has been
Câu trả lời là: C là đáp án đúng