Mary’s mother _____ her to sing since she was five.
A. teaches
B. teach
C. has taught
D. taught
since she was five: từ khi cô ấy 5 tuổi =>dấu hiệu của thì hiện tại hoàn thành (tức là đến giờ vẫn còn dạy)
=>Mary’s mother has taught her to sing when she was five.
Tạm dịch: Mẹ của Mary đã dạy cô ấy hát từ khi cô ấy 5 tuổi.
Đáp án cần chọn là: C
At Tet, my sister and her close friends often go to the hospitals to donate cakes, sweets and toys for the sick children there. They ______ it for many years.
Lan ______ English for more than a year but she can speak it very well.
He ______ lectures to foreign tourists about traditional food and games recently.