it was so quiet in the classroom that a needle—-————to drop

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/24 15:26:57

it was so quiet in the classroom that a needle—-————to drop onto the floor
Acould hear B was to be heard C could have been heard Dmust be heard
古怪 c

B was to be heard
be heard to drop 应该没有问题吧?
hear sth/sb.do 的被动语态.
could be heard to drop 也是对的.
但没有,
be to do 是表示"注定,能够"的意思
与be heard to drop结合就是B了
was to be heard to drop .
太静,针掉地下都没听到.
C 是用的虚拟,本能听到却没听到,意思错了,
D 一定,意思不好,说的是能不能的问题,或许真有人就没听到.

it was so quiet in the classroom that a needle—-————to drop ——that I couldn’t be absorbed in the work.A.It was so noisy It was a quiet day in the emergency room on December twenty— — It is so hot in the classroom. Would you mind ____ the win We could have to walk to the station; it was so near.—Yes.A — The classroom is ______ clean ______ it was yesterday. it was in the classroom ————we have economics classes —————— Everyone in the classroom( )quiet.A who was in the classroom at that time?A.Yes,it's Jack B.None It was polite ___ in the library .A.for him to keeping quiet we saw a UFO—— on the square in my dream A, to drop B,land, The classroom is so quiet,we can find ___in it.A:none B:not