You cannot take back your words _________ they are out of your mouth.
#30113
A
before
B
whether
C
once
D
while
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It will be another 50 years ______ our country is expected to reach the level of a medium developed country.
#30277
A
since
B
before
C
that
D
when
I refuse to accept the blame for something________was someone else’s fault.
#34746
A
who
B
that
C
as
D
what
(2014·山西部分重点高中高三联考)Mrs Black had such a wonderful time________she visited her friends in Sydney last year.
#30053
A
when
B
that
C
which
D
as