His birthday is 对on December 21st提问.

His birthday is 对on December 21st提问. His birthday is on December 21st.（对划线部分提问） His birthday is on July 21st.(对划线部分提问) my birthday is on on January 21st on January21st 对划线部分提问 下面还 对划线部分提问.【】代表线条 【1】My birthday is on 【April 21st】.【】 【】 your her birthday is on december His birthday is September 21st. Her mother’s birthday is （on the 2nd of December）对括号里的句子提问. Her birthday is in December.(对划线部分提问)(划线的是in December) Her birthday is December 15 th 对 December 15 th 提问 His birthday is on January 1st.改为同义句 His birthday is on october 5th.(对划线部分提问）划线的是His