手机APP：Toeic Practice
单元：Practice 7_126
题目：
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
疑问：为什么是C而不是B

简单死了 我3秒就过了

There is/are 不会有被动的表示