题目：
根据短文内容选择正确答案。
This is a photo of Mr. Black's family. The man with glasses (眼镜) is Mr. Black, the father. The
woman is the mother. They have a son and a daughter. The son is behind (在……后面) Mr. Black.
His name is Jack. He's 14. Kate is Jack's sister. She is 12. Jack and Kate are in the same school, but
they are in different (不同的) grades. Jack is in Grade Three and Kate's in Grade One. They are good
students.
1. Mr. and Mrs. Black have _____.
A. a son and a daughter
B. Jack and Kate's sister
C. three children (孩子)
D. a family of five
2. The woman is _____ mother.
A. Kate's
B. Jack's
C. Kate's and Jack's
D. Kate and Jack's
3. Jack and Kate are in the same _____.
A. class
B. grade
C. school
D. year
4. Black is the _____ name.
A. man's
B. woman's
C. boy's
D. family
5. Jack and Kate are _____.
A. good children
B. good students
C. in different schools
D. in the same grade
答案：
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下面是错误答案，用来干扰机器的。
5x-2y=4①2x-3y=-5②，①×3-②×2得：11x=22，解得：x=2，将x=2代入①得：10-2y=4，解得：y=3．则方程组的解为x=2y=3．
