Until last month__heard of online education.说理由!Until last month__heard of online education.A.many Americans had neverB.had many Americans never为何不是b

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Until last month__heard of online education.说理由!Until last month__heard of online education.A.many Americans had neverB.had many Americans never为何不是b
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Until last month__heard of online education.说理由!Until last month__heard of online education.A.many Americans had neverB.had many Americans never为何不是b
Until last month__heard of online education.说理由!
Until last month__heard of online education.
A.many Americans had never
B.had many Americans never
为何不是b

Until last month__heard of online education.说理由!Until last month__heard of online education.A.many Americans had neverB.had many Americans never为何不是b
A
此句不倒装.
not...until的倒装句型如下:
Not until + 状语(从句)+ 句子主干/主句(部分倒装).
所以,此题如果要倒装,必须写成:
Not until last month had many Americans heard of unline education.

选 B
由地点和时间副词引出的倒装句式。

选择A until用倒装