________ we had read your letter _____the true state of affairs.
#82514
A
It was until… that we understood
B
It was not until…that we understood
C
Until …did not we understand
D
Not until… we understood`
推荐题目
Only by increasing the number of doctors by 50 percent    properly in this hospital.
#81010
A
can be the patients
B
can the patients be treated
C
the patients can be treated
D
treated can be the patients
Children will work actively if_________________.
#83815
A
praise
B
praised
C
praising
D
to praise