昨天，我看见他和另一个男孩彼得说话，我忍不住想他是不是想让彼得取代我做他最好的朋友。
Yesterday, I saw him talking to another boy, Peter, and I cannot _______ _______ if he wants Peter to be his best friend instead of me.
我问过周围的人，发现许多人都愿意支付稍高一些的价钱来购买环保产品。
_______ _______, I find many people willing to pay a little higher price for the things that are friendly to the environment.
该组织还监视长江，阻止非法捕捞。非法捕捞已经威胁到野生动物的数量。
It also watches the river and stops the illegal hunting of animals, which has put the wild animal population _______ _______.
人类如果如此戏弄自然，可能将制造出一个现实生活中的弗兰肯斯坦怪物。
If mankind _______ _______ nature in this way, we may be on our way to producing a real-life Frankenstein’s monster.
难道我们为了保护自然就应该停止经济发展吗？
Would anyone say that development should be stopped _______ _______ of nature?