Question

K

想請問第一題 正確答案是B
為什麼不能選D？

Bow. They
the bridge for one year, and they are still building it.
(A) are built
(B) have built
(C) will build
(D) were building
102.
Jack
a science teacher since he was 22 years old.
(A) has been
(B) will be
(C) was
(D) is

Answer 1

yurika

持續到現在的動作要用現在完成式
而過去進行式用的時機是過去的某個時間點在持續做這件事

Answer 2

?

從過去到現在 用現在完成式（從for+一段時間 和 still building 可判斷）
D.是過去進行式