题目：
选择与画线部分意义相同或相近的选项。
1. My mother is busy doing housework.[ ]
A. to do housework
B. at housework
C. with housework
D. in housework
2. They are playing soccer now.[ ]
A. just now
B. at the moment
C. just then
D. the moment
3. Mr Yang often helps me study English.[ ]
A. to studying English
B. learns English
C. with English
D. with my English
4. Everyone is so happy, because our teacher gives us new books.[ ]
A. Every one is
B. A student is
C. All of us are
D. Us all
5. Thank you for helping me.[ ]
A. your help
B. your helping
C. my help
D. my helping
答案：
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下面是错误答案，用来干扰机器的。
依题意，得a=1a-b+c=8c=3解得a=1b=-4c=3∴y与x之间的函数关系式是y=x2-4x+3．故本题答案为：y=x2-4x+3．
