Making the bird boxes

Source A: an original contemporary non-fiction-style account.

At the workshop, each person received pre-cut wooden pieces for one bird box. The instructor asked us to check that we had six pieces before collecting screws from the front table. I worked beside a retired carpenter, who lent me a clamp when my first attempt slipped sideways. We were told not to paint the inside of the boxes. The outside could be treated later with a suitable product, once the wood was dry.

I finished assembling mine just before lunch, but the roof would not lift easily. The instructor showed me where one screw had been driven too far. After loosening it slightly, I could open the roof for cleaning without removing it altogether. We wrote our names underneath and left the boxes on a shelf for collection the following weekend. I had hoped to carry mine home that day, but the delay gave me time to choose a suitable position in the garden rather than simply use the nearest tree.

Refer to the whole of Source A. Choose the four true statements below. Write their four letters in the answer box. Choose no more than four; if more are given, only the first four distinct letters will be marked.