For most students doing too much homework endlessly is a ——(trie)task 为什么要加ing

问题描述:

For most students doing too much homework endlessly is a ——(trie)task 为什么要加ing
是——(tire)

tiring令人烦躁的,修饰名词
-ed,主语为人,感到什么
-ing,主语是物,令人怎么样