. ________ when the boulders suddenly disappeared.
#70294
A
So relieved we felt
B
How relieved we felt
C
What a relief we were feeling
D
How we felt relieved
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--Did Mary return late last night?--No. It was not yet 7 o’clock _________ she arrived home.
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A
before
B
when
C
that
D
until
______ environmental damage is done, it takes many years for the ecosystem to recover.
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A
Even if
B
If only
C
While
D
Once
The postman comes at 6:30 in the morning, ____ time I am usually fast asleep.
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A
when
B
at which
C
which
D
that
She won’t leave the TV set, ____ her husband is waiting for his supper.
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A
as though
B
even though
C
whether
D
whenever