The process ___energy is changed from one form into anther is called the transformation of energy
问题描述：
The process ___energy is changed from one form into anther is called the transformation of energy
A by which B at which C on which D for which
为什么选A?by 和谁有关系呀?
答
which是关系代词,指代前面的process,by which呢其实就是by the process
energy is changed from one form into anther by a process,and the process is called the transformation of energy