以抛物线y²=4x的焦点为圆心，半径为2的圆的方程为[ ]

A.x²+y²-2x-1=0

B.x²+y²-2x-3=0

C.x²+y²+2x-1=0

D.x²+y²+2x-3=0

将下列句子变为一般疑问句，1、2小题作肯定回答，3、4小题作否定回答。

1. The panda eats bamboo. 

    __________________________

2. He gets up early.

    __________________________

3. Li Lei's grandma lives in the house.

    __________________________

4. The elephant comes from Asia.

    __________________________