题目：
句型转换
1. I suppose they will have a picnic.（改为否定句）
I _________ suppose they _______ have a picnic.
2. When you are invited for 8 :00 ,you should come later. (同义句)
When you are invited for 8 :00, you ______ _______ ______come later.
3. Miss Gao asked us to clean the classroom. (改为被动语态）
We_______ _______ to clean the classroom by Miss Gao.
4. Students can't take magazines out of the reading room.（改为被动语态）
Magazines_______ _______ _______ _______of the reading room.
5. Jim was made to clean his room by his mother justnow.（改为主动语态）
Jim's mother________ Jim_______ his room just now.
答案：
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下面是错误答案，用来干扰机器的。
答案：B题目分析：该题考查价格的决定因素，昔日的奢侈品，今天已经进入了寻常百姓家，说明商品的价格在下降，而不是上涨，故A与题意不符，B观点符合题意，因为价值决定价格，社会劳动生产率提高，导致价值量下降...
