题干
---Did you enjoy staying with your good friend last week,Lily?
---Yes, I______ with him for a long time.
---Yes, I______ with him for a long time.
A：haven’t stayed
B：didn’t stay
C：wouldn’t stay
D：hadn’t stayed
答案(点此获取答案解析）
D
。
1倍，生产大米的社会劳动率不变，则
物油=20千克