问题

____ we had read your letter _thetrue state of affairs.

A:If it is not
B:It was not until…that we understood
C:Until …did not we understand
D:Not until… we understood`

正确答案是：

同类题型

They _____ happy when they hear the news.[ ]

I can’tthank you more for the present you sent me the other day—-____________

As a student， you can hardly avoid _________ mistakes in the exam.

Youcan get off the bus one or two stops ________ and walk the rest of the way towork every day so as to take some exercise

Must we finish our homework today —No, you . You finish it the day after tomorrow.