The grey building is where the workers live,and the white one is where the spare parts ________.
问题描述：
The grey building is where the workers live,and the white one is where the spare parts ________.
A) are producing
B) are produced
C) produced
D) being produced
答
B
灰色的大楼是工人们居住的地方,而白色的大楼是零件被生产的地方隹