Do you find it difficult to work out this problem?这句话有问题吗?为什
Do you find it difficult to work out this problem?这句话有问题吗?为什
I found it difficult to work out the problem.中it可以换成it's吗?为什
形式主语it 难题Do you think it difficult to work out this question
I find the problem difficult to work out.
I find difficult to work out the problem.
It's difficult for him to work out this maths problem 同义句是什么
I think .difficult to work out the problem.A,it B.this C.tha
How long () it () you to work out such a difficult problem?A
How long ___ it ___ you to work out such a difficult problem
He found it difficult to work out the problem.
I found it easy (to work) out the problem in this way. 括号内为什
I find it difficult to solve this problem .(改为复合句)