Jane was shy. She would not invite her classmates____speaking English.
A:practice
B:practices
C:practicing
D:to practice
秋天是一个秋高气爽的季节。秋天的树的叶子变黄了。秋天人们穿上了秋装。( )
广告费用X (万元)
1
2
3
4
5
6
7
销售额y (百万元)
2.9
3.3
3.6
4.4
4.8
5.2
5.9
根据表可得回归方程y=bx+a中的a为2.3,根据此模型预报广告费用为12万元时销售额为____万元.
The value of life does not ____ who you are, but what you do.