这个句子this problem is hard to be solved.
问题描述:
这个句子this problem is hard to be solved.
this problem is hard to be solved.
this problem is hard to solve.
是不是两个都是正确的呢?
答
第一个正确
第二个不对,因为问题应该被解决
应改为:It is hard to solve this problem.