76. 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.

77. 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.

78. 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 _______ _______.

79. 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.

80. 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?

完成句子（共10小题；每小题2分，满分20分）

1.We had so much trouble _____________________ our proposal.   (talk)

我们费了好大的劲才说服他接受我们的提议。

2.How come such a rich man robbed the bank?  It _______________________. (sense)

这么富有的一个人怎么会抢银行呢？这讲不通呀。

3.Many of the soldiers were diagnosed with cancer after they came back from the front because they ______________________ radiation during the war.   (expose)

很多士兵从前线回来都被诊断出了癌症，因为他们在战争期间曾暴露在辐射中。

4.Our software, unless _________________________, may not serve us well in our work.  (update)

除非定期升级，否则我们的软件无法很好地为我们服务。

5.The Western markets _________________________ cheap products made in China. (flood)

西方国家的市场上充斥着中国制造的廉价商品。

6.Only if you work hard from now on ______________________ your classmates in studies.   (catch)

只有从现在开始努力，你在学习上才能赶上你的同学

7.________________________________ at 2013 World Swimming Championships made us all very proud.   (win)

孙杨在2013年游泳世锦赛上夺得三枚金牌使我们都非常骄傲。

8.Luckily we brought with us a map, without which we                ___ in the jungle.（get）

幸运的是，我们带了地图，要不然在丛林里就迷路了。

9.Peter learned German, French and Spanish at an evening school, ____________ fluently now. (speak)

彼得在一所夜校学习了德语、法语和西班牙语，所有这些语言他现在都讲得很流利。

10.I can’t help thinking what it is in the computer games __________________ the boys.  （appeal）

我禁不住想，电脑游戏中到底是什么吸引了这些男孩子。