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Câu hỏi: Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
Mrs Nam will have lived here for 30 years ________.
A. by the time she retired
B. when she retired
C. by the time she retires
D. after she had retired
Mrs Nam will have lived here for 30 years ________.
A. by the time she retired
B. when she retired
C. by the time she retires
D. after she had retired
Kiến thức: Mệnh đề chỉ thời gian / Sự hòa hợp thì trong mệnh đề
By the time + S + V (hiện tại đơn), S + V (tương lai hoàn thành)
By the time + S + V (hiện tại đơn), S + V (tương lai hoàn thành)
Đáp án C.