加急!_______THEY HAD TAKEN OFF THEIR SHOSE WERE THEY ALLOWED T

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加急!_______THEY HAD TAKEN OFF THEIR SHOSE WERE THEY ALLOWED TO GET INTO THE LAB
A.IT WAS NUTIL
B.IT WAS NOT NUTIL
C.UNTIL
D.NOT UNTIL
貌似正确答案是B 麻烦请给解释

选D Not until
Not until they had taken off their shoes were they allowed to get into the lab.
意思是：他们不把鞋子脱掉的话是不被允许进入实验室的.
因为后面是用的倒装“were they...”故前面应是否定倒装“not until”
原句等价于：If they had taken off their shoes,they were allowed to get into the lab.
not...until=if

加急!_______THEY HAD TAKEN OFF THEIR SHOSE WERE THEY ALLOWED T 英译汉：They had grounded him beneath their heal,they had taken _______they may not succeed,they will try their best. (2/3)e told the plane ( ) ,A,had taken off B,put off C,was t they were crying ____they had lost their home The more money they had,the bigger their cars were. they were off on their 短语是 be off on one's onn they were not taken seriously. They had just taken their seats ,then_.A the chairman came B They didn't __ ___ on their days off had their off they their fun on day camping 连词成句 the rider and the bike__knocked the general off were taken t