________ 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`
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So difficult _______it to work out the problem that I decided to ask Tom for some advice.
#84494
A
I did find
B
did I find
C
I’ve found
D
have I found
—Do you often go to the gym? You look fit.—On the contrary, seldom ____ in my spare time.
#82464
A
I work out
B
did I work out
C
I worked out
D
do I work out
_____ I heard his voice trembling did I realize what trouble he was in.
#83256
A
Only when
B
Until when
C
No sooner had
D
Hardly had
Only after my friend came      .
#81153
A
did the computer repair
B
he repaired the computer
C
was the computer repaired
D
the computer was repaired