We didn't know ______such a difficult problem.
We didn't know ______such a difficult problem.
15.▲ such a difficult problem,I really didn’t know what to d
The Math problem is too difficult , we really don’t know ___
I really a difficult problem.I don't know what __ next
The math problem is so difficult,I don't know __ A how to do
As they had never __such a problem __this,they didn't know..
The teacher gave us so difficult a problem as we couldn't so
We Didn't Want You To Know
A Difficult English Problem
8.24,It's________thet we didn't know about this before.A ann
I didn't know whether we.(help)the farmer pick apples that a
Although the work was not difficult,yet he didn't know how t