QC小组活动是（）参与组织质量改进的一种有效方式。
A.部分员工
B.领导
C.广大员工
D.部分群众
参考答案：C
It was _____ back home after the experiment. [ ]
A. not until midnight did he go
B. until midnight that he didn't go
C. not until midnight that he went
D. until midnight when he didn't go
生物学零度
