正确答案：Will they play basketball in the morning No,they will do it in the afternoon.
楼上的“Are they play basketball in the morning No,they play in the afternoon”.中的Are是明显的英语语法错误.用are的时候,动词play需用现在进行式playing.且现在进行式不能用于此句的翻译.因为（1）、这里询问“上午打篮球吗”,说明打篮球的动作还未执行,所以用do和are均不正确.故应用一般将来式,Will来提问.（2）、而在对回答的翻译时,再用"play basketball" 显得罗嗦重复.可以用 “do it” 来代指“打篮球”这件事.
故正确答案：Will they play basketball in the morning No,they will do it in the afternoon.