Please take down my telephone number ________ something important happens.
#31553
A
in case
B
now that
C
even though
D
as if
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When the news came _______ the war broke out, he decided to serve in the army.
#31903
A
since
B
which
C
that
D
because
Children’s brains can’t develop properly_______ they lack protein
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A
when
B
since
C
because
D
unless
(2013·高考新课标全国卷Ⅰ)There’s no way of knowing why one man makes an important discovery________another man，also intelligent，fails.
#30672
A
since
B
if
C
as
D
while
The golden rule is not to waste time waiting for opportunity. Begin, ______ opportunity will find you.
#31329
A
and
B
when
C
so
D
because