Thanks for asking , jigjag.
I was busy yesterday.
I am finally picking it up.
I was familiar with US version. And hence my confusion.
I just looked at the UK version and everything fell into place.
Now I know why 2d and 28a have single letters.
The only answer I am missing is 4a. I have SOL.
Also 7a is a 4 letter answer starting with C.
The only problem is finding enough color pencils.
Crayons might work.