【名词&注释】
一次函数(linear function)、自变量(independent variable)、名词所有格(possessive case)
[单选题]已知二次函数y1=x2-x-2和一次函数y2=x+1的两个交点分别为A(-1，0)，B(3，4)，当y1＞y2时，自变量x的取值范围是（ ）
A. x-1或x＞3
B. -1x3
C. x-1
D. x＞3
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举一反三：
[单选题]12． ________mothers both work in the same hospital．
A. Tim and Peter-s
B. Tim's and Peter
C. Tim's and Peter's
D. Tim and Peter
[单选题]17．
A. on
B. at
C. in
D. for '
[单选题]24． Peter is tired of study，maybe because he _______ ．
A. has no close friends
B. has no pocket money
C. plays too many computer games
D. gets fatter and fatter
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