They can grow house plants, perhaps by the window or in the bathroom.
题意:
如果英国人没有花园,他们在哪里种植植物?
细节理解题。根据第一段,第二句If you don't have one, you can grow house plants, perhaps by the window or in the bathroom.如果你没有,你可以在室内种植植物,也许是在窗户边或浴室里。可知,如果英国人没有花园,他们可以在室内种植植物,也许是在窗户边或浴室里。故答They can grow house plants, perhaps by the window or in the bathroom.