5000 câu trắc nghiệm Tiếng Anh 9 có đáp án - Phần 1
Xem toàn bộ quiz

Before you asked, the letter________ a. was written b. had been written c. had written

14/20

Before you asked, the letter________

was written

had been written

had written

has been written

Giải thích

Chọn đáp án B