父母常为他做生日蛋糕 Parents ( ) or his birthday 括号里该填什么?
问题描述：
父母常为他做生日蛋糕 Parents ( ) or his birthday 括号里该填什么?
答
父母常为他做生日蛋糕.
Parents ( ) on his birthday.
应填：
always make birthday cake for him