It is reported that in New Mexico,not until they graduate_______toleave high school.

A
部分倒装,英语里,否定词置于句首,主句需部分倒装.
含有否定意义的副词或连词放在句首时.如：never,little,seldom,not,not only,not until,no sooner (…than),hardly (…when),rarely,scarcely,in no way等.
We seldom get up at four in the morning.
= Seldom do we get up at four in the morning.否定词在句首时要倒装，但本题not until的前面有in New Mexico，所以，not until并不是在句首，故答案就变成B了。能这样说吗？如果这样的话，这不是死扣语法吗？请高手指教！你没理解全面。部分倒装不是看整句的，而是看一个独立完整的句子，夲句not until they graduate_______toleave high school虽不是主句，但它是一个独立完整句子。