从类来看,《商品名称及编码协调制度》基本上按( )分类。
A. 商品的自然属性
B. 商品的功能
C. 商品的用途
D. 社会生产的分工
He was determined to ______ the cause of the food spoilage.
A. find out
B. figure out
C. look after
D. turn back
在学校人际关系系统中,处于主要地位的是( )。
A. 教师之间的关系
B. 干群关系
C. 师生关系
D. 同学关系
"We're late. The play has started.""I wonder how long ago ______."
A. did it begin
B. it began
C. was it beginning
D. it has begun