They sent an e-mail to their teacher
They sent an e-mail to their teacher.
teacher为疑问对象,然后改成疑问句Who did they send an e-mail to?这样改对吗?后面一定要接to吗?
参考答案:是,to后的对象就是who
They sent an e-mail to their teacher.
teacher为疑问对象,然后改成疑问句Who did they send an e-mail to?这样改对吗?后面一定要接to吗?
参考答案:是,to后的对象就是who