Ⅰ.单句语法填空
1．Many teens in high school want to try out for sports because they think it will make them more popular. ________ there are lots of other benefits of sports that they may ignore.
解析 考查连词。第一句句意：很多高中生想申请(参加)体育运动，因为他们认为体育运动会让他们更受欢迎。第二句句意：有很多其他可能被青少年忽略的体育运动的好处。分析语境可知，两句之间是转折关系，故填But。
答案 But
2．Hunting elephants was so profitable ________ from 1979 to 1989 the number of elephants in Africa fell from 1.3 million to 600,000.
解析 句意：猎杀大象能如此有利可图以至于从1979年到1989年，非洲大象的数量从130万下降到60万。so...that...意为“如此……以至于……”，引导结果状语从句。
答案 that
3．But for now, they all have to postpone their plans ________ the winter storms pass.
解析 句意：但是现在，他们都得把他们的计划推迟到冬季风暴结束才能实施。根据句意可知，设空处填till或until。
答案 till或until
4．Researchers have found, in their experiment, that a baby's cries can cause unique emotional responses in the brain, making it impossible for us to ignore them ________ we are parents or not.
解析 句意：研究者们在他们的实验中发现，婴儿啼哭能够引起头脑中独特的情感反应，使得我们不可能忽略他们，无论我们是不是父母。whether...or...可用来引导让步状语从句，意为“无论……还是……”。
答案 whether
5．However, most scientists regard it as nothing more than a legend only ________ there is a lack of concrete evidence.
解析 句意：然而，由于缺乏确凿的证据，大多数科学家认为那只是一种传说。设空处填从属连词because引导原因状语从句。
答案 because
6．In fact, the discontent things are not useless since you may learn more from them ________ from the things that cheer you up.
解析 句意：事实上，令人不满意的东西不是没有用途，因为与那些使你高兴的东西相比，那些令你不满意的东西可能会使你学到更多。根据本句中的more可推知设空处需填than，引导比较状语从句。
答案 than
7．________ you're from, you can come to dance, dine, and take part in outdoor and indoor concerts.
解析 句意：无论你来自哪里，你可以来跳舞、用餐、参加户外、户内的音乐会。根据上下文逻辑可知设空处引导让步状语从句，意为“无论什么地方”，故填Wherever。
答案 Wherever
8．I came to a crossroads with a traffic light. I was alone on the road then, but ________ I drove up to the light, it turned red, and I braked to a halt.
解析 句意：我来到了一个有交通信号灯的十字路口。当时我独自在公路上，但是当我开车到信号灯时，它变红了，我踩刹车停了下来。设空处引导时间状语从句，表示“当……的时候”，故填as或when。
答案 as /when
9．Talking about fires can be scary ________ no one likes to think about people getting hurt or their things getting burned.
解析 句意：谈论火灾可能会令人害怕，因为没人愿意考虑人们受伤或者他们的财产被烧。设空处引导原因状语从句，该原因状语从句说明主句发生的直接原因，故填because。
答案 because
10．The Great Wall winds its way from west to east, across deserts, over mountains, through valleys ________ at last it reaches the sea.
解析 句意：长城自西向东蜿蜒前进，横穿沙漠，跨过高山，穿过山谷，最终到达大海。设空处引导时间状语从句，意为“直到”，故填till或until。
答案 till /until
1．Many teens in high school want to try out for sports because they think it will make them more popular. ________ there are lots of other benefits of sports that they may ignore.
解析 考查连词。第一句句意：很多高中生想申请(参加)体育运动，因为他们认为体育运动会让他们更受欢迎。第二句句意：有很多其他可能被青少年忽略的体育运动的好处。分析语境可知，两句之间是转折关系，故填But。
答案 But
2．Hunting elephants was so profitable ________ from 1979 to 1989 the number of elephants in Africa fell from 1.3 million to 600,000.
解析 句意：猎杀大象能如此有利可图以至于从1979年到1989年，非洲大象的数量从130万下降到60万。so...that...意为“如此……以至于……”，引导结果状语从句。
答案 that
3．But for now, they all have to postpone their plans ________ the winter storms pass.
解析 句意：但是现在，他们都得把他们的计划推迟到冬季风暴结束才能实施。根据句意可知，设空处填till或until。
答案 till或until
4．Researchers have found, in their experiment, that a baby's cries can cause unique emotional responses in the brain, making it impossible for us to ignore them ________ we are parents or not.
解析 句意：研究者们在他们的实验中发现，婴儿啼哭能够引起头脑中独特的情感反应，使得我们不可能忽略他们，无论我们是不是父母。whether...or...可用来引导让步状语从句，意为“无论……还是……”。
答案 whether
5．However, most scientists regard it as nothing more than a legend only ________ there is a lack of concrete evidence.
解析 句意：然而，由于缺乏确凿的证据，大多数科学家认为那只是一种传说。设空处填从属连词because引导原因状语从句。
答案 because
6．In fact, the discontent things are not useless since you may learn more from them ________ from the things that cheer you up.
解析 句意：事实上，令人不满意的东西不是没有用途，因为与那些使你高兴的东西相比，那些令你不满意的东西可能会使你学到更多。根据本句中的more可推知设空处需填than，引导比较状语从句。
答案 than
7．________ you're from, you can come to dance, dine, and take part in outdoor and indoor concerts.
解析 句意：无论你来自哪里，你可以来跳舞、用餐、参加户外、户内的音乐会。根据上下文逻辑可知设空处引导让步状语从句，意为“无论什么地方”，故填Wherever。
答案 Wherever
8．I came to a crossroads with a traffic light. I was alone on the road then, but ________ I drove up to the light, it turned red, and I braked to a halt.
解析 句意：我来到了一个有交通信号灯的十字路口。当时我独自在公路上，但是当我开车到信号灯时，它变红了，我踩刹车停了下来。设空处引导时间状语从句，表示“当……的时候”，故填as或when。
答案 as /when
9．Talking about fires can be scary ________ no one likes to think about people getting hurt or their things getting burned.
解析 句意：谈论火灾可能会令人害怕，因为没人愿意考虑人们受伤或者他们的财产被烧。设空处引导原因状语从句，该原因状语从句说明主句发生的直接原因，故填because。
答案 because
10．The Great Wall winds its way from west to east, across deserts, over mountains, through valleys ________ at last it reaches the sea.
解析 句意：长城自西向东蜿蜒前进，横穿沙漠，跨过高山，穿过山谷，最终到达大海。设空处引导时间状语从句，意为“直到”，故填till或until。
答案 till /until
