A．单句填空
1．The exhibition tells us ________we should do something to stop air pollution.
答案 why [句意：该展览告诉我们为什么我们要采取措施阻止空气污染。根据句意以及句子结构可知，空格处用why引导宾语从句。]
2．—I wonder ________Mary has kept her figure after all these years.
—By working out every day.
答案 how [根据答语“By working out every day”可知，空格处用how 来引导宾语从句，表示方式。]
3．Reading her biography, I was lost in admiration for________ Doris Lessing had achieved in literature.
答案 what [句意：读着她的自传，我对Doris Lessing 在文学上已经取得的成就赞叹不已。根据句子结构来判断，for后接一个宾语从句，而从句中缺少宾语，所以要用what。]
4．We must find out________Karl is coming, so we can book a room for him.
答案 when [句意：我们一定要搞清楚Karl什么时候来，以便我们给他订房间。由句意可知，要给Karl订房间，那么就要清楚他来这里的时间，故填when。]
5．Susan made it clear to me ________ she wished to make a new life for herself.
答案 that [句意：苏珊清楚地向我表明，她希望自己开始一种新的生活。it为形式宾语，设空处引导的宾语从句为真正的宾语。从句结构和句意完整，故用that。]
6．After a long journey, those young men finally reached ________they called the paradise.
答案 what [句意：长途跋涉后，这些年轻人最终到达了他们称之为天堂的地方。“________they called the paradise”是宾语从句，作reach的宾语，在从句中call缺宾语，故用what引导宾语从句同时作从句中call的宾语。]
7．The 3G cellphone must be of great use and convenience to________wants to get the information through the Internet quickly.
答案 whoever [句意：3G手机对于那些想要快速浏览网络获取信息的人来说一定是非常方便实用的。whoever引导宾语从句作介词to的宾语，且whoever在从句中作主语，相当于anyone who。]
8．John seemed puzzled about________the question meant.
答案 what [句意：John 对这个问题意味着什么感到很迷惑。根据句子的结构判断，about后接的是一个宾语从句，而从句中meant缺少宾语，所以填what。]
9．Mom often phones me, asking________I am getting along with my studies.
答案 how [句意：母亲常给我打电话，问我学习进展如何。此处asking 后为宾语从句，根据句意可知，应填how。]
10．Are you sure________Mr Li will come to your birthday party?
答案 that [句意：你确定李先生要来参加你的生日晚会吗？空处引导宾语从句，且在从句中不作成分，故用that引导。]
B．单句改错
1．It is difficult for us to imagine that life was like for slaves in the ancient world.
________________________________________________________
答案 that→what [句意：对我们来说很难想象在古代奴隶的生活是什么样子的。What... be like为固定形式，表示“……是什么样子”。what引导的宾语从句作imagine的宾语，同时what在宾语从句中作介词like的宾语。]
2．Pick yourself up. Courage is doing that you're afraid to do.
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答案 that→what [句意：振作起来。勇气就是做你害怕要去做的。分析句子结构可知，doing后为宾语从句，从句中缺少宾语，故用what。that在名词性从句中不作成分。]
3．Police have found where appears to be the lost ancient statue.
________________________________________________________
答案 where→what [句意：警察已经找到了与丢失的古代的雕像类似的东西。分析句子结构可知，用what引导宾语从句，并在从句中作主语。where是副词，不作主语。]
4．Experts believe why people can waste less food by shopping only when it is necessary.
________________________________________________________
答案 why→that [句意：专家们相信，人们只有在必要时才去购物就能减少食物浪费。根据句意和结构可知，believe后面要求接宾语从句，而且从句中不缺句子成分，也无意义，所以用that。]
5．Some people care much about their appearance and always ask if they look fine in which they are wearing.
________________________________________________________
答案 which→what [句意：有些人太过在意自己的外表，总是问(别人)自己穿在身上的衣服看起来是否不错。分析句子结构，再结合句意“他们所穿的衣服”应使用连词what引导这一宾语从句，what在从句中作wear的宾语，指代人穿的衣服。which在引导名词从句时意为“哪一个”，不合题意，故把which改为what。]
6．Only when you go to New York City in person will you realize what diverse the American culture is.
________________________________________________________
答案 what→how [句意：只有当你亲自来到纽约时，你才会意识到美国文化是多么不同。根据how＋adj./adv.＋主语＋其他部分可知，应用how。故把what改为how。]
7．The bride and groom gave who attended their wedding some gifts to share their happiness.
________________________________________________________
答案 who→whoever [句意：新郎和新娘给任何一个参加他们婚礼的人发礼物以分享他们的幸福。分析句子成分可知，“who attended their wedding”是宾语从句，从句中缺少主语，故用whoever，意为“无论谁”，而who意为“谁”，表疑问。]
8．—Dad, I want to go out for dinner with my friends tonight.
—Keep in mind when you have to be home by 9：00.
________________________________________________________
答案 when→that [句意：——爸爸，今晚我想和朋友们一起出去吃饭。——记住你9点前必须回家。keep in mind that...是习惯用语，意为“记住……”，其中that引导的从句作keep的宾语。故把when改为that。]
9．This still leaves the question of that local public services should be improved in the next five years.
________________________________________________________
答案 that→how [句意：未来五年地方公共服务应该如何改进的问题仍然遗留下来。应用how引导的从句作介词of的宾语，且how在从句中作方式状语。how意为“如何”，that无意义。故把that改为how。]
10．He seems too tired today, and I wonder that he got a good sleep last night.
________________________________________________________
答案 that→if/whether [句意：他今天似乎太累了，我想知道他昨天晚上是否睡得好。宾语从句表示是否，动词后可用if或whether, that无意义，故把that改为if/whether。]