51.You have no idea ________ I went through to get this task finished in time.
A. which B. that C. whether D. what
52.He talked about the classmates and the school _____ he had visited.
A. who B. that C. which D. about which
53.While he ______ his homework, his mother came in.
A. does B. did C. was doing D. do
54.If the new safety system ______ to use, the accident would never have happened.
A. had been put B. were put C. should be put D. would be put
55.You are waiting at a wrong place. It is at the hotel ______ the coach picks up tourists.
A. who B. which C. where D. that
51.【答案】D。解析:考查同位语从句,句意:你不知道为使这项任务及时完成,我经历了些什么。动词短语"go though"意为"经历",分析句子结构可知,从句中的谓语"go though"缺少宾语,连词"that和whether"在名词性从句中不当任句子成分. 排除BC;"which"表示已知道事物中的哪一个,不合句意,从而排除A;因此应该用疑问代词"what"引导同位语从句,解释说明名词"idea"的具体内容,因此D为正确答案。
52.【答案】B。解析:先行词为the classmates and the school,从句为he had visited,二者构成的完整句为He had visited the classmates and the school.所以不难发现先行词在限定性定语从句中作visited的宾语使用,先行词既指人又指物。故选B。
53.【答案】C。解析:此题考查时间状语从句。while引导的时间状语从句,从句往往用进行时态。故选C。
54.【答案】A。解析:根据句意可知,考查虚拟语气. 跟过去事实相反,从句用had done,主句用would have done,再结合new safety system 是被投入使用,故用had been done,即答案为A.
55.【答案】D。解析:判断是否为强调句是将 it 和 be 还有 that (who) 去掉后看剩下的部分是否为一个独立的句子,而本句中剩下的部分构成一个完整的句子,故为强调句。强调句的关系词有that、who、whom,而只有在当强调的部分是人,且为句子的主语时,才用 who,故此处应填 that。故正确答案为D。
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