阅读下面句子，根据课文内容填空。
【小题1】You have every right __________ by your friend if she told your secret to others and then pretended that she was innocent, but perhaps she didn’t do it.
【小题2】___________. The best way to have a friend is to be a friend.
【小题3】The number of people in the world keeps growing, and we are producing more rubbish and __________more raw materials.
【小题4】________, metal products and paper products require a lot of energy to produce, so you should find ways to use these again without throwing them away.
【小题5】..., you will find a sense of satisfaction knowing that you __________ solve the problem of climate change.
【小题6】I want to become an environmental __________ after I graduate.
【小题7】It is ________ to our future — and to the future of our nation — for us to learn how to use information technology, so we really need to update the computers and other equipment.
【小题8】However, the cost of building a VR studio is quite high, and this seems like a real __________.