Students in English-speaking countries usually address their man teacher ‘sir”, but __________ their woman teacher “madam”.A.seldom they addressB.do they seldom addressC.seldom do they addressD.they seldom do address
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C解析试题分析：seldom很少，否定含义，放在句首，句中的主谓要用倒装结构。句意：讲英语国家的学生通常尊称其男教师为“先生”，但很少称其女教师为“女士”。考点：倒装
点评：掌握英语中否定词放在句首，句子结构要主谓倒装。hardly, in no way, little, scarcely, seldom, never, no more, no longer, not, not only, no sooner, not only … (but also),not until… 等具有否定意义的词或词组位于句首，句子用部分倒装。部分倒装：指将谓语的一部分如助动词或情态动词倒装至主语之前,而谓语动词无变化。如果句中的谓语没有助动词或情态动词，则需添加助动词do, does或did，并将其置于主语之前。eg：No sooner had I got home then it began to rain. 我刚到家就下起了雨。Seldom do I go to work by bus. 我很少乘公共汽车上班。Not until twelve o'clock did she go to bed last night . 她昨晚十二点才上床睡觉。