Our coach says we won’t keep winning games ______ we keep playing well.
#31727
A
because
B
unless
C
when
D
while
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She is _____ careful girl ______ she hardly makes mistakes in the exam. 
#33861
A
so, that
B
such, that
C
a such, that
D
such a, that
—Did you meet with the famous star?—______ I had come here earlier.
#33473
A
Only if
B
If only
C
But for
D
As long as
(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