Mr.Smith asked the boy a question________he could go to the concert with him.
#67065
A
whether
B
that
C
what
D
if
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Occasions are quite rare ____I have the time to spend a day with my kids.
#71821
A
who
B
which
C
why
D
when
_____ is known to everybody, the moon travels round the earth once every month.
#73358
A
It
B
As
C
That
D
What
—The experiment is of particular importance. —I see. We will carry on with it ________ we can get enough money.
#72812
A
unless
B
though
C
whether
D
until