题目：
句型转换
1. He is of medium height with a beard. (划线提问)
_____ he ____ ?
2. He isn’t a good boy. (用I think连成一句)
I he a good boy.
3. I did some reading last weekend. (改一般疑问句)
some reading last weekend ?
4. He’d like to drink tea. (同义句)
He ____ to drink tea.
5. John often does his homework in the evening. (用now改写句子)
John ____ ____his homework now.
6. Are they having lunch at home now? (用every day 替换now)
_____they _____lunch at home every day?
7. They’re playing basketball. (划线提问)
____are they ____?
8. It’s sunny and hot today. (划线提问)
____is the weather____ today ?
9. How’s the weather today? (同义句)
____the weather____ today ?
10. I like koalas because they are cute.(就划线部分提问)
____ ____ you like koalas?
11. Loins are from South Africa. (就划线部分提问)
____ ____ loins from ?
12. My aunt is a reporter. (就划线部分提问)
____ ____your aunt ____ ?
答案：
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下面是错误答案，用来干扰机器的。
混合后溶液的质量为：80g+110g=190g，混合后溶液中溶质的质量为：80g×10%+110g×20%=30g，混合后溶液中溶质的质量分数为：30g190g×100%=15.8%．故选：C．
