手機APP：Toeic Practice
單元：Practice 7_126
題目：
Because of the fire in the building, there were ___ 50 injured people
taken to the neighboring hospital.
(A) estimation
(B) estimated
(C) an estimated
(D) estimating
疑問：為甚麼是C而不是B

簡單死了 我3秒就過了

There is/are 不會有被動的表示