阅读理解。 Where does gum (口香糖) come from? People like gum. But where does gum come from? At first, all gum came from trees. These trees have something inside. It looks like white water, which can be made into gum. Now most gum is made from other things. But some gum still comes from trees. 1. People ______ gum. A. like B. drink C. hate D. write with 2. This story tells us where gum ______. A. grows B. comes from C. is made D. is 3. At first, all gum came from ______. A. animals B. trees C. other things D. water 4. The trees have something inside that looks like ______. A. something B. other things C. gray gum D. white water 5. Now, all gum comes from trees, doesn't it? A. Yes,it is. B. Yes, it does. C. No, it isn't. D. No, it doesn't.