【推荐1】________ (nature) food is good for our health. (所给词的适当形式填空)

【推荐2】It is hoped that ________(nature) resources will be found on Mars. (所给词的适当形式填空）

【推荐3】In order to protect the environment people shouldn’t destroy ______（nature）balance.

【推荐1】We were given a________（guide）tour of the royal courts of Europe. （所给词的适当形式填空）

【推荐2】Analyses of a language database also confirmed that there was a __________ (globe) change in the sound of world languages after the Neolithic age, with the use of “f” and “v” increasing remarkably during the last few thousand years. (所给词的适当形式填空)

【推荐3】I feel there is something ___________(lack) in my life.  （所给词的适当形式填空）