When I was at school, I spent two summers at my grandfather’s. They were the ___GOOD___ holidays I’ve ever had. Grandpa lived alone in a country cottage near a small river. Grandpa’s hobby was making birdhouses. He always said that he ___NEED___ a hobby to fill his free time. Grandpa’s workshop was full of all kinds of tools. There ___BE___ a big table, hammers, nails, paints, and what not. And all the tools ___KEEP___ carefully in their places. That was Grandpa’s number one rule. The ___TWO___ rule was, “Never buy a new tool if the old one still works.” In the workshop, when he ___MAKE___ the birdhouses, I asked him lots of questions about birds. He ___KNOW___ a lot about them! He could tell one bird from another by their songs and footprints. I was surprised that Grandpa ___NOT/PAINT___ the birdhouses in bright colours. He explained to ___I___ that birds prefer natural colours that make their houses more difficult to notice and, for that reason, safer.