根据所给中文意思完成句子，每空只填一个词。
骑车上学不仅有趣而且环保。
Cycling to school is both enjoyable and _____________________ _________________.
难怪它看起来那么真实。
_______________ __________________ it looks real.
即使是最简单的日常活动也会对环境有重大的影响。
Even the simplest everyday activities can ______________ a _________________ to the environment.
在把垃圾扔掉之前应该先将它们分类。
The waste should be sorted before it is ________________ __________________.
他已经浏览了图书馆里所有的书。
He has ______________ ______________ all the books in the library.
Mary 上个月顺便来看了我。
Mary _______________ _______________ on me last month.
和其他地方比，那通常非常热、充满阳光。
It’s usually very hot and sunny __________________ ________________ many other places.
他们的家庭和我们的相似。
Their family is_________________ _______________ ours.
我们也挂起海报来告诉学生们怎样做是环保和节能。
We have also ________ _________ posters to tell the other students how to be green and save energy.
网络的发明帮助人们彼此交流。
The invention of the Internet helps people_____________ _____________ each other.