Practice one 1. The room is very dark because there is a heavy curtain not opened. 2. The print and material of this book are very good. 3. This table is made of pine , not mahogany. 4. I prefer duvets to quilts, because the duvet is lighter and warmer. 5. I like the view(Can I use 'view'? Or scenery?) of the place , it is natural and beautiful. 6. It's a happy thing to make friends, and we can open our eyes and know more interesting things and people.