So difficult did I find ___ to work out the problem that I decided to ask my partner for help.

       A. myself                       B. us                            C. it                            D. that

So difficult did I find ___ to work out the problem that I decided to ask my partner for help.

1. A.
   myself
2. B.
   us
3. C.
   it
4. D.
   that

So difficult did I find ___ to work out the problem that I decided to ask my partner for help.

      A. myself                 B. us                       C. it                       D. that

So difficult did I find ____ to work out the problem that I decided to ask my partner for help.

A．myself           B．us           C．it         D．that

So difficult did I find ___ to work out the problem that I decided to ask my partner for help.

    So difficult __________ it to work out the problem that I decided to ask Tom for advice.

A. I did find   B. did I find

C. I have found      D. have I found

So difficult ___it to work out the problem that I decided to ask Tom for advice.

A. I did find   B. did I find   C. I have found    D. have I found

So difficult ______ it to work out the problem that I decided to ask Tom for advice.

A．I did find B．did I findC．I have foundD．have I found

So difficult ___it to work out the problem that I decided to ask Tom for advice.

A. I did find   B. did I find   C. I have found    D. have I found

 So difficult         it to work out the problem that I decided to ask Tom for advice.

     A. I did find        B. did I find         C. I have found       D. have I found