改为一般疑问句： 1.They can sing English songs.
2.His birthday is on the twentieth of November.3.Lucy and Amy are learning to skate.4.It is diffic ult for giant pandas to survive in the wild.5.I believe what he said is true.6.I must stay at home for a whole day.7.There is going to be a meeting this afternoon.改为一般疑问句.