Whatever is left over may be put into the refrigerator，________ it will keep for two or three weeks.(2011·安徽)
#30498
A
when
B
which
C
where
D
while
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Feathers fall to the ground slowly,________ stones fall much faster.
#80177
A
but
B
however
C
while
D
yet
________ you’ve tried yourself, you’ll never know what an exciting game bungee jumping is.
#31090
A
Though
B
Because
C
Unless
D
If
---Will you go to the meeting for their discussion?---No, ______ invited. I don’t feel like getting involved with their business.
#31658
A
unless
B
until
C
even if
D
otherwise