The Internet ____is useful.The problem is,you shouldn't spend much time on it.A .it B.itself 原因!
问题描述：
The Internet ____is useful.The problem is,you shouldn't spend much time on it.A .it B.itself 原因!
答
B.itself 因为The Internet ____is useful这个句子本身就是一个完整的句子,有主谓宾 这样就可以去掉A了嘛呵呵