________ he found the idea interesting, it was too difficult to be of practical use.
#29985
A
While
B
Once
C
If
D
Until
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______ I failed in English a third time, I had no doubt about my gift for foreign languages.
#31630
A
By the time
B
Until
C
After
D
Unless
________ the whole society care for children as well as their parents, children can grow healthily and happily
#79712
A
As soon as
B
Once
C
The moment
D
So long as
How can you expect him to make any progress _____ you never give him a chance to have a try?
#30913
A
when
B
unless
C
even though
D
until
—Can’t you stay a little longer? I really want to talk more with you,—Me, too. I have to get home before 10 at night.
#32581
A
But
B
Since
C
And
D
For
She’ll never forget her stay there ________ she found her son who had gone missing two years before.
#80671
A
that
B
which
C
where
D
when