Question 12: Mrs Brown will have worked at this school for 30 years__________ .
A. by the time she retires
B. when she retired
C. as soon as she had retired
D. after she had retired
Đây là thì Tương lai hoàn thành
-S+will+have/has+P.P...
Dấu hiệu:
-by the time + mệnh đề chia ở thì hiện tại đơn (by the time I get up,…)
Chúc bạn học tốt
Xin hay nhất!!