英语

　　1.In the experiment the researcher placed a rat in a maze ( ) it was presented with different smells to see if it can.

　　A. what

　　B. that

　　C. where

　　D. which

　　【答案】C。考查定语从句，“在这个实验中，是将小白鼠放置在雾霾中进行测试”，in a maze是先行词，是一种状态，且后面的从句是个完整的句子，所以应该用关系副词，故选项C正确。A项不用于定语从句中;B项that在定语从句中通常充当主语或宾语，修饰人或物;D项的先行词应该是物。

　　2.Doctors have to be very careful when making a ( ).

　　A. treatment

　　B. symptom

　　C. diagnosis

　　D. patient

　　【答案】C。考查词汇辨析，A指治疗，B指症状，C指诊断，D指病人。在这句中就是指医生在诊断的时候要非常谨慎认真。故选项C正确。

　　3.She would rather that her husband ( ) travel duing the bad weather but he insists that he return home today.

　　A. do not

　　B. not

　　C. must not

　　D. did not

　　【答案】D。考查虚拟语气。would rather that sb.，这里要用虚拟语气，这个是与现在相反，故要用过去时，所以选项D正确。