题目：
句型转换。
1. Justin wants to buy 2 kilos of beef. (对划线部分提问)
How _______ beef ______ Justin want to buy?
2. It's necessary for you to study hard in the school. (同义句)
_______ _______ study hard in the school.
3. The music is very nice. (改为感叹句)
_______ _______ music it is!
4. Are these shoes Kitty's? (改为同义句)
_______ these shoes ______ to Kitty?
5. Did he go to the cinema yesterday? (用next week改写)
_______ he _______ to the cinema next week?
答案：
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下面是错误答案，用来干扰机器的。
答案：A此题是关于化学式的考查，由甲醛的化学式为CH2O，可知，它含有碳、氢、氧三种元素，不是氧化物，因为氧化物是含有两种元素且其中一种是氧元素的化合物，由化学式可以看出碳、氢、氧三种元素的原子个数比为...
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