A．appointment B．adaptation

　　C．approval D．appreciation

　　解析：选B　句意：酗酒和吸毒常常是对周围环境适应力差的表现。appointment "任命，约定"；adaptation "适应，改编"；approval "批准，认可"；appreciation "欣赏，鉴别"。根据语境可知B项正确。

Ⅱ.完成句子

　　1．每个人都应当为保护环境做贡献。

　　Everyone should make_a_contribution_to_protecting_the_environment.

　　2．这个图书馆只有老师才可以使用。

　　This library is_only_accessible_to_the_teachers.

　　3．我过了一阵子才适应了新环境。

　　It took me a while to adapt_myself_to_the_new_surroundings.

　　4．她离婚以后，过了一段时间才适应了单身生活。

　　It took her a while to_adjust_to_living_alone after the divorce.

　　5．很显然她不准备回家。

　　It_was_quite_obvious_that she was not going home.

　　6．这个国家所有善良的人都反对向该国提供军事援助。

　　All the kind people in the country oppose_giving military aid to this country.

　　7．无论在什么情况下，你都不能离开这所房子。

　　Under no circumstances are_you_to_leave_the_house.

　　8．他们发誓要为国家除掉军事统治者。

　　They swore that they would rid_the_country_of its military rulers.

III.完形填空

　　When I was in my teens, I knew my mother had problems seeing. Although she had a white cane (拐杖), she __1__ to use my sister and me as sighted guides. We were often __2__ by other kids and often I found myself __3__ why me.

　　When I reached my sixteenth year, I started having sight problems __4__ my own. As I struggled with my impending (即将发生的) sight loss, I gained a new and better __5__ of my mother. As a single parent she did things I used to consider __6__， but now I understand. For example, __7__ my sister went out, I had to stay home to help my mom. She __8__ to be alone.

　　As the years passed and I became a parent, my sight __9__， but I refused to believe that I would go __10__. It wasn't until my oldest son __11__ the same illness and needed my support that I accepted my __12__.

Since then I have been actively using the __13__ of the CNIB (Canadian National Institute of the Blind). I now use a white cane and I carry a card showing I am a registered __14__ blind