He went back to work in his country after he _______ his course on Advanced Engineering
He went back to work in his country after he _______ his course on Advanced Engineering in London.
A. finishes
B. has finished
C. had finished
D. was finishing
Đáp án đúng: C
Dùng quá khứ hoàn thành vì hành động đã xảy ra từ trước.
Dịch nghĩa: Anh ấy quay trở lại làm việc ở nước mình sau khi hoàn thành khóa học về Kỹ thuật nâng cao ở London.