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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。] | 
