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

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

3 . It is hoped that ________(nature) resources will be found on Mars. (所给词的适当形式填空）

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

5 . In order to protect the environment people shouldn’t destroy ______（nature）balance.

6 . As ________ (nature) architects, the Pueblo Indians figured out exactly how thick the adobe walls needed to be to make the cycle work on most days. (所给词的适当形式填空)

7 . One of the founders, the painter and ____________ (nature) Peter Scott, designed the famous panda logo.

8 . Honest is a ________ (nature) quality (品质). (所给词的适当形式填空)