(2013·宁夏银川一中高三第四次考试)________ scores of times, but he still couldn't understand it.
#30539
A
Having explained
B
Having been explained
C
Though it was explained
D
It was explained
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--- The MP3 cost me about 2,000 yuan. --- Well, it was crazy of you to spend so much money_____you could buy a cheaper one.
#32857
A
when
B
unless
C
if
D
because
Several weeks had gone by _______ I knew the painting was missing.
#32417
A
as
B
since
C
until
D
before
In the earthquake, parents were willing to do they could their children.
#33518
A
whatever; save
B
whatever; to save
C
what; saving
D
what; to save
—I still haven’t decided whether to go or not.—But your time is running out. Please make up your mind ______ it is too late.
#32256
A
when
B
since
C
until
D
before