84. 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.

83. 他们的家庭和我们的相似。

Their family is_________________ _______________ ours.

82. 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.

81. Mary 上个月顺便来看了我。

Mary _______________ _______________ on me last month.

80. 他已经浏览了图书馆里所有的书。

He has ______________ ______________ all the books in the library.

79. 在把垃圾扔掉之前应该先将它们分类。

The waste should be sorted before it is ________________ __________________.

78. 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.

77. 难怪它看起来那么真实。

_______________ __________________ it looks real.

根据所给中文意思完成句子，每空只填一个词。

76. 骑车上学不仅有趣而且环保。

Cycling to school is both enjoyable and _____________________ _________________.