1. heating → heated
heated adj.热烈的
2. there → it
固定句型“it is + adj.(necessary) to do sth”的一般疑问句
3. student → students
student是可数名词,其前有some“一些”,当然用复数形式students
4. the → an/another
句意为“有一种/另外一种观点”.
5. 去掉the
前面foreign teachers为泛指,所以students也是泛指,不用加定冠词the
6. especial → especially
用副词especially引导状语,意思是“尤其/特别”.