1 . People should make full use of _______ (nature) resources. (所给词的适当形式填空)

2 . Finally, let’s work together _________ (save) energy and protect our _________ (nature) environment. (所给词的适当形式填空)

3 . I love cooking, so it’s very ________ (nature) for me to share the food 1 make with my family and friends. （所给词的适当形式填空）

4 . The same goes for________(nature) fibers;…（所给词的适当形式填空）

5 . As is known to all, the ________(nature) resources are limited. （所给词的适当形式填空）

6 . This proverb is saying we have to let things go in their ________ (nature) course. （所给词的适当形式填空）