_______these coins are of different shapes, sizes and colors, they all date back to a long, long time ago.
#32529
A
Since
B
Unless
C
Once
D
While
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It’ll be a year and a half ______ the next Olympic Games are held in London in 2012.
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A
since
B
when
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before
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until
I have received an offer from a German university, but I’m still hesitating ______ I should accept it.
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A
how
B
why
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that
D
whether
He smiled politely ________ Mary apologized for her drunken friends.(2012·山东)
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A
as
B
if
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unless
D
though
In your class, you should allow students to voice their opinions, they are different from your own.
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A
until
B
unless
C
even if
D
as though