A:3x±4y=0
B:3x±5y=0
C:5x±4y=0
D:4x±3y=0
It's generous __ ___ them to donate money to UNICEF. They think it important _____ them to help poor children go to school.
下面句中有一处错误,请找出来并改正。
Sandy come from Beijing, but he lives in Donghai now.
____
— Thank you for your coffee. I'm afraid I have to be off now.— OK, _______.