如果P（a-3，a+1）在第二象限，那么a的取值范围是[ ]
A.a>-1
B.a＜3
C.-3＜a＜3
D.-1＜a＜3
答案：D
Betty is busy all day. She has ______ free time than I.
[ ]
A. much
B. more
C. fewer
D. less
图中，弹簧测力计的示数为______________N。
