—I often have hamburgers for lunch.
—You'd better not. It's bad for you _________ too much junk food.
A:eat
B:to eat
C:eating
D:ate
当实数x的取值使得x-1有意义时,函数y=-x+3中y的取值范围是( )
在我国改革开放中,首先进行改革的是( )