I got 8 correct and about 24 incorrect. I hadn't realized they are mainly American trees, so there were a few that there is no way I would have known - such as sassafras, black gum, redbed, cottonwood. the drawings are lovely. I will probably refer to this site to learn to identify some trees that are along the streets and in parks here.
Did you know you can zoom in on what's on your monitor by holding down Ctrl and clicking repeatedly on the + key (top right) until you get the required size. then you can bring it back down by holding Ctrl and pressing on the - (minus) key.