The efforts made by the researchers _____ possible the appea
1个回答

很简单!

The efforts (made by the researchers) made possible the appearance of the new life-saving medicine.

参考译文:研究者们的努力使新的救命药物的出现成为可能.

解析:

1、括号中的内容为说明项,不要受到干扰;

2、the appearance of the new life-saving medicine其实就可以用it来代替,也就不需要在made后加it了.