As the sea ice melts sooner each swimmer,polar bears are forced to come ashore earlier and face food shortages _____ they have stored enough fat to last them through the season.
#31875
A
before
B
unless
C
since
D
until
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We’ve given her some advice, but I don’t know________ she’ll accept it．
#30103
A
what
B
where
C
whether
D
Which
It just isn’t fair. _____ I was working as a waiter last month, my friends were lying on the beach.
#30208
A
Whenever
B
Though
C
For
D
While
(2008·山东，26)Occasions are quite rare ________ I have the time to spend a day with my kids.
#30483
A
who
B
which
C
why
D
when
—My son is addicted to computer games. He is hopeless, isn't he?—Yes, _____ he is determined to give up and start all over.
#31438
A
if
B
when
C
even if
D
unless
The school ______Elias studied for only two years was three miles away.
#32965
A
where
B
that
C
on which
D
which